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Patente

Referenziert von

Zitiert von PatentEingetragenAusgestelltUrsprünglich Bevollmächtigter Titel
US39613222. Juli 19741. Juni 1976Real time signal discrimination circuitry
US412120811. März 197717. Okt. 1978Siemens AktiengesellschaftDevice for increasing the safety with respect to transmission faults in an information transmission system
US413867611. März 19776. Febr. 1979Siemens AktiengesellschaftMethod and device for increasing the security against transmission errors in an information transmission system
US41684965. Okt. 197718. Sept. 1979Quasi-stationary noise cancellation system
US421534231. März 197829. Juli 1980Intex Inc.Merchandise tagging technique
US425180815. Nov. 197917. Febr. 1981Shielded balanced loop antennas for electronic security systems
US430391025. Apr. 19781. Dez. 1981Parmeko LimitedDetection system
US43695576. Aug. 198025. Jan. 1983Process for fabricating resonant tag circuit constructions
US447134429. Apr. 198211. Sept. 1984ICI Americas Inc.Dual frequency anti-theft system
US455541415. Apr. 198326. Nov. 1985Polyonics CorporationProcess for producing composite product having patterned metal layer
US45659966. Febr. 198421. Jan. 1986Mrs. Lawrence IsraelRange limited coherent frequency doppler surveillance system
US457865416. Nov. 198325. März 1986Minnesota Mining and Manufacturing CompanyDistributed capacitance lc resonant circuit
US45959156. Febr. 198417. Juni 1986Mrs. Lawrence IsraelElectronic surveillance system employing the doppler effect
US45982766. Nov. 19841. Juli 1986Minnesota Mining and Manufacturing CompanyDistributed capacitance LC resonant circuit
US460584522. Nov. 198312. Aug. 1986Detectable card and entry and departure checking apparatus utilizing the same
US46582649. Nov. 198414. Apr. 1987Minnesota Mining and Manufacturing CompanyFolded RF marker for electronic article surveillance systems
US466673530. Okt. 198519. Mai 1987Polyonics CorporationProcess for producing product having patterned metal layer
US477907713. Apr. 198718. Okt. 1988Continuously armed high reliability pulse train processor
US481282231. Aug. 198714. März 1989Monarch Marking Systems, Inc.Electronic article surveillance system utilizing synchronous integration
US485558317. Aug. 19878. Aug. 1989Figgie International, Inc.Structure and method of making combination proximity/insertion identification cards
US486428017. Febr. 19885. Sept. 1989N. V. Netherlandsche Apparatenfabriek NedapFlexible detection label
US489302720. Mai 19889. Jan. 1990Gebhard Balluff Fabrik Feinmechanischer Erzeugnisse GmbH & Co.Proximity switch insensitive to interference fields
US510617529. Nov. 199021. Apr. 1992AT&T Bell LaboratoriesLocatable object suitable for underground use and methods of locating same
US515547214. Juli 198613. Okt. 1992Introtek International, Inc.Contact type liquid level sensing system
US518293822. Febr. 19912. Febr. 1993Nordson CorporationMethod and apparatus for detecting bubbles in pressurized liquid dispensing systems
US528548115. Okt. 19918. Febr. 1994National Semiconductor CorporationReceiver circuit with smart squelch
US535301015. Dez. 19924. Okt. 1994Minnesota Mining and Manufacturing CompanyDevice and a method for detecting a magnetizable marker element
US544777927. Jan. 19935. Sept. 1995Tokai Electronics Co., Ltd.Resonant tag and method of manufacturing the same
US551077030. März 199423. Apr. 1996Checkpoint Systems, Inc.Surface deactivateable tag
US557443129. Aug. 199512. Nov. 1996Checkpoint Systems, Inc.Deactivateable security tag
US558925122. Aug. 199531. Dez. 1996Tokai Electronics Co., Ltd.Resonant tag and method of manufacturing the same
US558982011. Okt. 199531. Dez. 1996PAC/SCAN, Inc.Retail theft prevention and information device
US55943797. Juli 199514. Jan. 1997International Rectifier CorporationMethod and Circuit to eliminate false triggering of power devices in optically coupled drive circuits caused by dv/dt sensitivity of optocouplers
US56025317. Mai 199611. Febr. 1997Minnesota Mining and Manufacturing CompanyElectronic article surveillance system with adaptive filtering and digital detection
US56614704. März 199426. Aug. 1997Object recognition system
US568281422. Aug. 19954. Nov. 1997Tokai Electronics Co., Ltd.Apparatus for manufacturing resonant tag
US56892637. Jan. 199418. Nov. 1997Esselte Meto International GmbHAntipilferage markers
US578676320. Juni 199628. Juli 1998Sensormatic Electronics CorporationAntenna multiplexer with isolation of switching elements
US586180922. Sept. 199719. Jan. 1999Checkpoint Systems, Inc.Deactivateable resonant circuit
US606423716. Apr. 199816. Mai 2000LG Semicon Co., Ltd.Device for removing noise
US626597623. Juni 200024. Juli 2001Single Chip Systems CorporationMethod and apparatus for providing receiver dual channel coupling in a reader for RFID tags
US692570113. März 20039. Aug. 2005Checkpoint Systems, Inc.Method of making a series of resonant frequency tags
US694696316. Okt. 200220. Sept. 2005Spectra Research, Inc.Secure storage disc and disc surveillance system
US69478609. Aug. 200220. Sept. 2005Sensormatic Electronics CorporationElectronic article surveillance system stationary tag response canceller
US707685819. Okt. 200418. Juli 2006Checkpoint Systems, Inc.Method for controlling resonant tag frequency
US716815019. Okt. 200430. Jan. 2007Checkpoint Systems, Inc.Method of making a resonant frequency tag
US746005925. Okt. 20062. Dez. 2008Sandia CorporationRemoving interfering clutter associated with radar pulses that an airborne radar receives from a radar transponder