S. Martin Vossiek, “Vorrichtung und Abbildungsverfahren mit synthetischer Apertur zum Bestimmen eines Einfallwinkels und/oder einer Entfernung,” European Patent EP 000002270541B1, Mar. 22, 2017 .
D. Schneiderbanger, L.-P. Schmidt, R. Rehner, M. Sterns and C. Evers, “Hochintegriertes Mikrowellensystem,” German Patent DE 102009009655B4, Mar. 31, 2016 .
T. Bosselmann, K. Huber, A. Schicht, L.-P. Schmidt, J. Weinzierl and M. Willsch, “Vorrichtung zur Radialspaltmessung mit Millimeterwellen,” European Patent EP 2042830B1, Jan. 13, 2016 .
H. Hampel, U. Berold, C. Reck, L.-P. Schmidt and R. Trommer, “Reconfigurable Bandpass Filter Based on a Planar Combline Filter Comprising Varactor Diodes,” U.S. Patent US 9160045B2, Oct. 13, 2015 .
A. Albsmeier, W.-E. Bulst, K. Pistor, F. Schmidt, O. Sczesny, C. Seisenberger and M. Vossiek, “Thermally feedable transmitter and sensor system,” European Patent EP 000001389332B1, Mar. 4, 2015 .
U. Haberland, F. Kuenzler, R. Rehner, L.-P. Schmidt and J. Weinzierl, “Verfahren und Vorrichtung zur Bestimmung eines Abstandes zu einem Zielobjekt,” European Patent EP 000001877825B1, Sept. 3, 2014 .
B. Ulrich, H. Hampel, C. Reck, L.-P. Schmidt and J. Weinzierl, “Vorrichtung und Verfahren zur verbesserten Richtungsschätzung und Decodierung mittels Sekundärradarsignalen,” European Patent EP 000002247960B1, Aug. 27, 2014 .
J. Bräutigam, S. Müller, M. Ruf and L.-P. Schmidt, “Verfahren zum Betreiben eines Linearbeschleunigers und nach diesem Verfahren betriebener Linearbeschleuniger,” German Patent DE 102012219726B3, Mar. 13, 2014 .
A. Albsmeier, W.-E. Bulst, K. Pistor, F. Schmidt, O. Sczesny, C. Seisenberger and M. Vossiek, “Thermisch speisbarer Sender und Sensorsystem,” German Patent DE 000010125058B4, Feb. 27, 2014 .
M. Aigle, S. Martius, R. Rehner, L.-P. Schmidt, D. Schneiderbanger, M. Sterns and C. Tremmel, “Magnetisch durchstimmbares Filter mit Koplanarleitungen,” European Patent EP 000002036160B1, Jan. 22, 2014 .
P. Gulden, S. Roehr and M. Vossiek, “Radio transmitter, radio receiver, system and method with a radio transmitter and radio receiver,” U.S. Patent US 000008559554B2, Oct. 15, 2013 .
F. Gumbmann, M. Jeck, L.-P. Schmidt, H.-P. Tran and J. Weinzierl, “Verfahren und Vorrichtung zur hochauflösenden Abbildung von Prüfobjekten,” European Patent EP 000001984758B1, July 31, 2013 .
P. Gulden, S. Roehr and M. Vossiek, “Radio transmitter, radio receiver, system and method with a radio transmitter and radio receiver,” Japanese Patent JP 000005243412B2, July 24, 2013 .
F. Gumbmann, M. Jeck, L.-P. Schmidt, H.-P. Tran and J. Weinzierl, “Verfahren und Vorrichtung zur Abbildung von Prüfobjekten mittels elektromagnetischer Wellen, insbesondere zur Kontrolle von Personen auf verdächtige Gegenstände,” European Patent EP 000001922561B1, Nov. 7, 2012 .
S. Max and M. Vossiek, “Apparatus and imaging method with synthetic aperture for determining an incident angle and/or a distance,” U.S. Patent US 000008299959B2, Oct. 30, 2012 .
K. Blum, B. Gohlke, P. Heide, F. Schmidt, O. Sczesny and M. Vossiek, “FMCW-Verfahren zum Bestimmen des Abstandes zwischen zwei Fahrzeugen,” German Patent DE 000019946168B4, Sept. 6, 2012 .
B. Ulrich, H. Hampel, C. Reck, L.-P. Schmidt and J. Weinzierl, “Device and method for the improved directional estimation and decoding by means of secondary radar signals,” U.S. Patent US 000008253622B2, Aug. 28, 2012 .
R. Rehner, L.-P. Schmidt, D. Schneiderbanger and M. Sterns, “Ferrite filter comprising aperture-coupled fin lines,” U.S. Patent US 000008207801B2, June 26, 2012 .
U. Haberland, F. Kuenzler, R. Rehner, L.-P. Schmidt and J. Weinzierl, “Method and device for determining a distance to a target object,” U.S. Patent US 000008174434B2, May 8, 2012 .
A. Albsmeier, W.-E. Bulst, K. Pistor, F. Schmidt, O. Sczesny, C. Seisenberger and M. Vossiek, “Heating control system,” U.S. Patent US 000008150340B2, Apr. 3, 2012 .
P. Heide, M. Nalezinski, M. Vossiek and L. Wiebking, “Transpondersystem und Verfahren zur Entfernungsmessung,” European Patent EP 000001442318B1, Mar. 21, 2012 .
M. Aigle, S. Martius, R. Rehner, L.-P. Schmidt, D. Schneiderbanger, M. Sterns and C. Tremmel, “Magnetically tunable filter with coplanar lines,” U.S. Patent US 000008120449B2, Feb. 21, 2012 .
P. Gulden, F. Kirsch and M. Vossiek, “Circuit arrangement and method for synchronization of clocks in a network,” U.S. Patent US 000008108558B2, Jan. 31, 2012 .
P. Gulden, S. Max and M. Vossiek, “Funkbasiertes Ortungssystem mit synthetischer Apertur,” European Patent EP 000001834191B1, July 27, 2011 .
R. Rehner, L.-P. Schmidt, D. Schneiderbanger and M. Sterns, “Ferritfilter aus blendengekoppelten Flossenleitungen,” European Patent EP 000002100343B1, June 15, 2011 .
P. Gulden, S. Max and M. Vossiek, “Radiobased locating system provided with a synthetic aperture,” U.S. Patent US 000007948431B2, May 24, 2011 .
C. Seisenberger and M. Vossiek, “Method and device for the synchronization of radio stations and a time-synchronous radio bus system,” U.S. Patent US 000007940743B2, May 10, 2011 .
M. Vossiek and P. Heide, “Verfahren zur Messung einer Kanallänge und System zur Kanallängenmessung zur Durchführung des Verfahrens,” German Patent DE 10054180B4, Nov. 11, 2010 .
D. Diehl, U. von Knobloch, W. Renz and L.-P. Schmidt, “Magnetresonanzanlage mit Hochfrequenzschirm mit frequenzabhängiger Schirmwirkung ,” German Patent DE 102007014135B4, Nov. 1, 2010 .
T. Bosselmann, K. Huber, A. Schicht, L.-P. Schmidt, J. Weinzierl and M. Willsch, “Verfahren zur Radialspaltmessung mit Millimeterwellen,” German Patent DE 102007046441B4, Aug. 19, 2010 .
F. Gumbmann, M. Jeck, L.-P. Schmidt, H.-P. Tran and J. Weinzierl, “Method and device for high-resolution imaging of test objects by electromagnetic waves, in particular for monitoring people for suspicious items,” U.S. Patent US 000007710307B2, May 4, 2010 .
M. Vossiek, P. Heide, M. Nalenzski and L. Wiebking, “Transponder system and method for measurement of separation,” Chinese Patent CN 100585432C, Jan. 27, 2010 .
D. Diehl, W. Renz, L.-P. Schmidt and U. von Knobloch, “Magnetic resonance system with radio-frequency shield with frequency-dependent shielding effect,” U.S. Patent US 000007642780B2, Jan. 5, 2010 .
F. Gumbmann, M. Jeck, L.-P. Schmidt, H.-P. Tran and J. Winezierl, “Method and device for imaging test objects by means of electromagnetic waves, in particular for inspecting individuals for suspicious items,” U.S. Patent US 000007609196B2, Oct. 27, 2009 .
M. Vossiek and W.-E. Bulst, “Reifenmessung mit einem energieautark modulierten Backscatter-Transponder,” German Patent DE 10253278B4, Oct. 8, 2009 .
M. Vossiek, “Method and apparatus for determining a deviation between clock pulse devices,” U.S. Patent US 7594133B2, Sept. 22, 2009 .
M. Vossiek and P. Heide, “Multistatic method and device for radar measuring a close distance,” U.S. Patent US 7589665B2, Sept. 15, 2009 .
M. Vossiek, P. Heide, M. Nalenzski and C. Seisenberger, “Active backscatter transponder, communication system comprising the same and method for transmitting data by way of such an active backscatter transponder,” European Patent EP 1481367B1, July 29, 2009 .
M. Vossiek, F. Schmidt, O. Sczesny and L. Reindl, “Surface acoustic wave component which can be interrogated by radio and has an optimum code size,” Canadian Patent CA 2356610C, Mar. 10, 2009 .
M. Vossiek, F. Schmidt, O. Sczesny, A. Albsmeier, B. Wolf-Eckhart, M. Guntershofer, K. Pistor and C. Seisenberger, “Inductive voltage generator,” Japanese Patent JP 4225792B2, Feb. 18, 2009 .
M. Vossiek, “Method and apparatus for determining a deviation between clock pulse devices,” British Patent GB 2430570B, Jan. 21, 2009 .
M. Vossiek and P. Heide, “Multistatic method and device for radar measuring a close distance,” Japanese Patent JP 4200135B2, Dec. 24, 2008 .
M. Vossiek, P. Heide, M. Nalenzski and R. Roskosch, “Device for producing oscillator signal,” Chinese Patent CN 100439936C, Dec. 3, 2008 .
M. Vossiek and W.-E. Bulst, “Mesure de pneus effectuee au moyen d'un transpondeur a retrodiffusion modulee de maniere autonome en energie,” French Patent FR 2847373B1, July 18, 2008 .
M. Vossiek, F. Schmidt, O. Sczesny, A. Albsmeier, B. Wolf-Eckhart, K. Pistor and C. Seisenberger, “Thermally feedable transmitter and sensor system,” U.S. Patent US 7392022B2, June 24, 2008 .
M. Vossiek and P. Gulden, “Method and device for operating a pmd system,” European Patent EP 1307718B1, June 11, 2008 .
M. Vossiek and F. Schmidt, “Activation system,” Chinese Patent CN 100380830C, Apr. 9, 2008 .
M. Vossiek and P. Heide, “Multistatic method and device for radar measuring a close distance,” Chinese Patent CN 100354648C, Dec. 12, 2007 .
M. Vossiek and F. Schmidt, “Activation device for a remotely triggerable switching system,” Japanese Patent JP 4012511B2, Nov. 21, 2007 .
M. Vossiek, F. Schmidt, O. Sczesny and L. Reindl, “Remote-inquiry surface acoustic wave component with optimum code space,” Chinese Patent CN 100344988C, Oct. 24, 2007 .
M. Vossiek and M. Nalenzski, “Radar having a transmission oscillator which can be excited quasi-phase coherently by an evaluation oscillator,” U.S. Patent US 7283087B2, Oct. 16, 2007 .
M. Vossiek, P. Gulden and S. Max, “Radio-based tracking system with synthetic aperture,” Taiwanese Patent TW 288245B, Oct. 11, 2007 .
M. Vossiek, P. Heide, M. Nalenzski and C. Seisenberger, “Active backscatter transponder, communication system comprising the same and method for transmitting data by way of such an active backscatter transponder,” U.S. Patent US 7242259B2, July 10, 2007 .
M. Vossiek and F. Schmidt, “System and method for receiving a signal to trigger a pyroelectric activation system,” U.S. Patent US 7233256B2, June 19, 2007 .
M. Vossiek and M. Nalenzski, “Radar having a transmission oscillator which can be excited quasi-phase coherently by an evaluation oscillator,” European Patent EP 1608999B1, Apr. 11, 2007 .
M. Vossiek and F. Schmidt, “Activation device for a remotely triggerable switching system,” European Patent EP 1449309B1, Mar. 21, 2007 .
M. Vossiek, P. Heide, J. Ilg, R. Roskosch, K. Hofbeck and W. Piesch, “Procede et disositif de transmission de donnees entre une unite de base et une unite de cle moboile d`un dispositif de controle d`habilition d`acces, Notamment pour vehicule automobile,” French Patent FR 2807556B1, Jan. 26, 2007 .
M. Vossiek and C. Seisenberger, “Method and device for the synchronization of radio stations and a time-synchronous radio bus system,” Japanese Patent JP 3870194B2, Jan. 17, 2007 .
M. Vossiek and P. Heide, “Multistatic method and device for radar measuring a close distance,” European Patent EP 1570291B1, Dec. 27, 2006 .
M. Vossiek, F. Schmidt, O. Sczesny, A. Albsmeier, B. Wolf-Eckhart, M. Guntershofer, K. Pistor and C. Seisenberger, “Induktiver Spannungsgenerator,” German Patent DE 10125059B4, Nov. 9, 2006 .
M. Vossiek, P. Heide, M. Nalenzski and L. Wiebking, “Transponder system and method for measurement of separation,” U.S. Patent US 7119736B2, Oct. 10, 2006 .
M. Vossiek, P. Heide and B. Kreppold, “Sensor system,” European Patent EP 0963561B1, Sept. 20, 2006 .
M. Vossiek, “Energieautark modulierter Backscatter-Transponder,” German Patent DE 10239303B4, Aug. 3, 2006 .
M. Vossiek and W.-E. Bulst, “Tire measuring device with a modulated backscatter transponder self-sufficient in terms of energy,” U.S. Patent US 7076998B2, July 18, 2006 .
M. Vossiek, P. Heide, R. Roskosch, K. Hofbeck, W. Piesch and J. Ilg, “Dispositif antivol pour vehicule automobile et procede de mise en oeuvre d`un tel dispoditif antivol,” French Patent FR 2801549B1, June 9, 2006 .
M. Vossiek, F. Schmidt, O. Sczesny, A. Albsmeier, B. Wolf-Eckhart, M. Guntershofer, K. Pistor and C. Seisenberger, “Inductive voltage generator,” European Patent EP 1389358B1, Feb. 15, 2006 .
M. Vossiek, P. Heide, M. Nalenzski and R. Roskosch, “Device for producing oscillator signal,” Japanese Patent JP 3725864B2, Dec. 14, 2005 .
M. Vossiek, P. Heide, M. Nalenzski and R. Roskosch, “Device for producing oscillator signal,” U.S. Patent US 6894572B2, May 17, 2005 .
M. Vossiek, P. Heide, M. Nalenzski and C. Seisenberger, “Active backscatter transponder, communication system comprising the same and method for transmitting data by way of such an active backscatter transponder,” Taiwanese Patent TW 224898B, Dec. 1, 2004 .
M. Vossiek, P. Gulden and P. Heide, “Photoelectronic mixing device (pmd) system,” European Patent EP 1332549B1, Nov. 17, 2004 .
M. Vossiek, P. Heide, R. Roskosch, K. Hofbeck, W. Piesch and J. Ilg, “Anti-theft protection system for a motor vehicle, and a method for operating an anti-theft protection system,” U.S. Patent US 6809629B2, Oct. 26, 2004 .
M. Vossiek, P. Gulden, P. Heide and E. Storck, “Method for the noise-free evaluation of radar signals,” U.S. Patent US 6810342B1, Oct. 26, 2004 .
M. Vossiek, P. Heide, M. Nalenzski and R. Roskosch, “Device for producing oscillator signal,” European Patent EP 1297357B1, Sept. 15, 2004 .
M. Vossiek and P.-C. Eccardt, “Method for detecting skin structure of human body,” Chinese Patent CN 1155335C, June 30, 2004 .
R. Engelbrecht and L.-P. Schmidt, “Lichtwellenleiter, Laser und optischer Verstärker für hohe spektrale Leistungsdichten,” German Patent DE 10318937A1, Apr. 25, 2004 .
M. Vossiek and C. Seisenberger, “Verfahren und Vorrichtungen zur Synchronisation von Funkstationen und zeitsynchrones Funkbussystem,” German Patent DE 10157931C2, Dec. 11, 2003 .
M. Vossiek and P.-C. Eccardt, “Method of identifying people,” European Patent EP 0833587B1, Oct. 22, 2003 .
M. Vossiek and P. Gulden, “Elektro-optisches Messsystem und Verfahren zur Reduzierung von Störsignalen in einem elektro-optischen Messvorgang,” German Patent DE 10210038B4, Oct. 2, 2003 .
M. Vossiek, F. Schmidt, O. Sczesny and L. Reindl, “Remote-inquiry surface acoustic wave component with optimum code space,” Australian Patent AU 764427B2, Aug. 21, 2003 .
M. Vossiek, P.-C. Eccardt, K. Niederer, T. Scheiter and T. Koelpin, “Surface micro-mechanic ultrasonic transducer,” European Patent EP 0935741B1, July 23, 2003 .
M. Vossiek and N. Kroemer, “Method and device for measuring the distance of an object from an ultrasonic transmission/reception unit,” Japanese Patent JP 3419460B2, June 23, 2003 .
M. Vossiek, F. Schmidt, O. Sczesny and L. Reindl, “Remote-Inquiry surface acoustic wave component with optimum code space,” European Patent EP 1141746B1, June 11, 2003 .
M. Vossiek, P. Heide and M. Wagner, “Verfahren zur Unterscheidung der Form von Ablagen eines Backofens sowie Backofen,” German Patent DE 10063694C2, June 5, 2003 .
M. Vossiek, P.-C. Eccardt, K. Niederer, T. Scheiter and T. Koelpin, “Surface micro-mechanic ultrasonic transducer,” Japanese Patent JP 3395844B2, Apr. 14, 2003 .
M. Vossiek, F. Schmidt, A. Albsmeier, O. Sczesny and U. Knauer, “Configuration for generating a response signal, carrying an information item, to a received electromagnetic radiation, and method for generating the response signal,” European Patent EP 1145037B1, Apr. 9, 2003 .
M. Vossiek, E. Storck and P. Heide, “Method and device for measuring distance and speed,” U.S. Patent US 6529794B1, Mar. 4, 2003 .
M. Vossiek, P. Gulden, P. Heide and E. Storck, “Method for the noise-free evaluation of radar signals,” European Patent EP 1183503B1, Jan. 15, 2003 .
M. Vossiek, E. Storck and P. Heide, “Method and device for measuring distance and speed,” European Patent EP 1004036B1, Oct. 16, 2002 .
M. Vossiek, F. Schmidt, O. Sczesny and L. Reindl, “Surface acoustic wave component which can be interrogated by radio and has an optimum code size,” U.S. Patent US 6455979B2, Sept. 24, 2002 .
M. Vossiek, P. Gulden and P. Heide, “PMD-System,” German Patent DE 10047170C2, Sept. 19, 2002 .
M. Vossiek and P. Gulden, “Verfahren und Vorrichtungen zum Betrieb eines PMD-System,” German Patent DE 10039422C2, Aug. 1, 2002 .
M. Vossiek, P. Heide and M. Wagner, “Verfahren und Vorrichtung zum Messen und Überwachen von erwärmungsbedingten Veränderungen von Substanzen in einem Backofen,” German Patent DE 10063692C2, July 4, 2002 .
M. Vossiek and P. Heide, “Sensor system operating method and a sensor system,” European Patent EP 0965052B1, May 22, 2002 .
M. Vossiek, P. Heide, R. Roskosch, K. Hofbeck, W. Piesch and J. Ilg, “Diebstahlschutzsystem für ein Kraftfahrzeug und Verfahren zum Betreiben eines Diebstahlschutzsystems,” German Patent DE 19957549C2, Apr. 25, 2002 .
M. Vossiek, P.-C. Eccardt, K. Niederer, T. Scheiter and T. Koelpin, “Surface micromachined ultrasonic transducer,” U.S. Patent US 6320239B1, Nov. 20, 2001 .
M. Vossiek, P.-C. Eccardt, N. Kroemer and V. Magori, “Process for the recognition and separation of useful and interfering echoes in the received signals of distance sensors which operate in accordance with the pulse-echo principle,” Japanese Patent JP 3207426B2, Sept. 10, 2001 .
M. Vossiek and P. Heide, “Sensor system operating method and a sensor system,” U.S. Patent US 6278398B1, Aug. 21, 2001 .
M. Vossiek, P. Heide and B. Kreppold, “Sensor system,” U.S. Patent US 6255984B1, July 3, 2001 .
M. Vossiek and P.-C. Eccardt, “Method of identifying people,” U.S. Patent US 6228029B1, May 8, 2001 .
M. Vossiek, P. Gulden, P. Heide and E. Storck, “Verfahren zur störsignalfreien Auswertung von Radarsignalen,” German Patent DE 19925216C1, Jan. 4, 2001 .
M. Vossiek and P.-C. Eccardt, “Method of identifying people,” Japanese Patent JP 3065356B2, July 17, 2000 .
W. Menzel and L.-P. Schmidt, “Mischeranordnung für den Mikrowellenbereich ,” German Patent DE 000004107112C2, May 11, 2000 .
M. Vossiek, F. Schmidt, O. Sczesny and L. Reindl, “Funkabfragbares Oberflächenwellen-Bauelement mit optimalem Codeumfang,” German Patent DE 19860058C1, Mar. 30, 2000 .
W. Menzel and L.-P. Schmidt, “Anordnung zum elektrischen Verbinden von Mikrowellenleitungsstrukturen mit anderen Schaltungsteilen,” German Patent DE 000004118541C2, Apr. 1, 1999 .
M. Vossiek and P.-C. Eccardt, “Adaptive optimization process for ultrasonic measurement signals,” Japanese Patent JP 2846125B2, Jan. 13, 1999 .
M. Vossiek, P.-C. Eccardt, N. Kroemer and V. Magori, “Process for the recognition and separation of useful and interfering echoes in the received signals of distance sensors which operate in accordance with the pulse-echo principle,” European Patent EP 0689679B1, May 27, 1998 .
M. Vossiek, P.-C. Eccardt, N. Kroemer, V. Magori and S. Lechner, “Method for determining the position of an object relative to the background with ultrasound,” European Patent EP 0748454B1, Apr. 29, 1998 .
M. Vossiek, H. Ruser, V. Magori and A. von Jena, “Verfahren zur Entfernungs- und Geschwindigkeitsmessung von Objekten mittels Ultraschall,” German Patent DE 19716680C1, Apr. 23, 1998 .
H. Callsen and L.-P. Schmidt, “180 Grad Phasenumtast-/Amplitudenmodulator für Mikrowellen,” German Patent DE 000003933055C2, Feb. 26, 1998 .
M. Vossiek and N. Kroemer, “Method and device for measuring the distance of an object from an ultrasonic transmission/reception unit,” European Patent EP 0705444B1, Mar. 5, 1997 .
M. Vossiek, P.-C. Eccardt, N. Kroemer and V. Magori, “Ultrasonic inspection procedure for the detection of tree-dimensional patterns,” European Patent EP 0669004B1, Jan. 22, 1997 .
M. Vossiek, “Verfahren zur Objekterkennung,” German Patent DE 4438643C2, Dec. 19, 1996 .
M. Vossiek, P.-C. Eccardt, N. Kroemer, V. Magori and S. Lechner, “Verfahren zur Bestimmung der Lage eines Objekts relativ zum Hintergrund mittels Ultraschall,” German Patent DE 4406525C2, Oct. 24, 1996 .
M. Vossiek and P.-C. Eccardt, “Verfahren zur adaptiven Optimierung von Ultraschallmeßsignalen,” German Patent DE 19509374C1, July 4, 1996 .
H. Kuhrmann and L.-P. Schmidt, “Adapter zwischen einem Mikrowellen-Sensor und einer handelsüblichen Zündkerze,” German Patent DE 000003704290C2, Jan. 18, 1996 .
H. Adolph, W. Menzel and L.-P. Schmidt, “Anordnung zur Aufteilung von Höchstfrequenzenergie,” German Patent DE 000003601553C2, Aug. 24, 1995 .
M. Vossiek, P.-C. Eccardt, N. Kroemer and V. Magori, “Verfahren zur Erkennung und Separation von Nutz- und Störechos im Empfangssignal von Abstandssensoren, welche nach dem Impuls-Echo-Prinzip arbeiten,” German Patent DE 4308373C2, Apr. 13, 1995 .
H. Kuhrmann and L.-P. Schmidt, “Schalter zur Wegumschaltung zwischen zwei Hohlleitern,” German Patent DE 000003609347C2, Mar. 16, 1995 .
H. Meinel and L.-P. Schmidt, “Millimeterwellen-Anordnung in Finleitungstechnik,” German Patent DE 000003229795C2, Jan. 17, 1991 .
H. Kuhrmann, W. Menzel, L.-P. Schmidt and H.-G. Wippich, “Adaptor between a millimeter wave sensor and conventional spark plug, especially for TDC measurement in Otto Engines,” European Patent EP 000000126985B1, June 24, 1987 .