Assignee
LANDIS+GYR AG
CH·136 granted patents·3 pending applications·6,385 citations·filing 1975–2022
Top patents by PatentIndex Score
139 records- 0198US4568141ADocument having an optical-diffraction authenticating elementLANDIS & GYR AG·Filed 1983·Granted Feb 4, 1986·165 cites·7 claims
- 0298US4184700ADocuments embossed with optical markings representing genuineness informationLANDIS & GYR AG·Filed 1978·Granted Jan 22, 1980·261 cites·7 claims
- 0397US5101184ADiffraction element and optical machine-reading deviceLANDIS & GYR AG·Filed 1989·Granted Mar 31, 1992·200 cites·10 claims
- 0497US4979149ANon-volatile memory device including a micro-mechanical storage elementLANDIS & GYR AG·Filed 1989·Granted Dec 18, 1990·229 cites·10 claims
- 0597US4501439ADocument having a security feature and method of determining the authenticity of the documentLANDIS & GYR AG·Filed 1982·Granted Feb 26, 1985·108 cites·6 claims
- 0697US4250217ADocuments embossed with machine-readable information by means of an embossing foilLANDIS & GYR AG·Filed 1976·Granted Feb 10, 1981·112 cites·5 claims
- 0797US4119361AMultilayer identification cardLANDIS & GYR AG·Filed 1976·Granted Oct 10, 1978·129 cites·6 claims
- 0896US4829352AIntegrable Hall elementLANDIS & GYR AG·Filed 1987·Granted May 9, 1989·118 cites·6 claims
- 0996US4742296AArrangement for measuring electrical powerLANDIS & GYR AG·Filed 1986·Granted May 3, 1988·122 cites·42 claims
- 1096US4211918AMethod and device for identifying documentsLANDIS & GYR AG·Filed 1978·Granted Jul 8, 1980·138 cites·15 claims
- 1195US4894610ACurrent-transformer arrangement for an electrostatic meterLANDIS & GYR AG·Filed 1986·Granted Jan 16, 1990·90 cites·14 claims
- 1295US4761253AMethod and apparatus for producing a relief pattern with a microscopic structure, in particular having an optical diffraction effectLANDIS & GYR AG·Filed 1987·Granted Aug 2, 1988·112 cites·16 claims
- 1395US4700211ASensitive magnetotransistor magnetic field sensorLANDIS & GYR AG·Filed 1983·Granted Oct 13, 1987·102 cites·8 claims
- 1495US4596950ACompensated transducerLANDIS & GYR AG·Filed 1981·Granted Jun 24, 1986·97 cites·8 claims
- 1595US4525668ASystem for measuring electrical output or energyLANDIS & GYR AG·Filed 1981·Granted Jun 25, 1985·73 cites·10 claims
- 1695US4250393APhotoelectric apparatus for detecting altered markingsLANDIS & GYR AG·Filed 1979·Granted Feb 10, 1981·86 cites·8 claims
- 1795US4223050AProcess for embossing a relief pattern into a thermoplastic information carrierLANDIS & GYR AG·Filed 1978·Granted Sep 16, 1980·96 cites·9 claims
- 1894US4513274ACurrent transformer for measuring instrumentsLANDIS & GYR AG·Filed 1983·Granted Apr 23, 1985·64 cites·6 claims
- 1994US4309655AMeasuring transformerLANDIS & GYR AG·Filed 1978·Granted Jan 5, 1982·69 cites·12 claims
- 2093US5128855ABuilding automation system operating installation control and regulation arrangementLANDIS & GYR AG·Filed 1989·Granted Jul 7, 1992·232 cites·24 claims
- 2193US4929993AHall element device with depletion region protection barrierLANDIS & GYR AG·Filed 1986·Granted May 29, 1990·94 cites·6 claims
- 2293US4662653AOptically diffracting security elementLANDIS & GYR AG·Filed 1984·Granted May 5, 1987·82 cites·10 claims
- 2393US4607271AMagnetic field sensorLANDIS & GYR AG·Filed 1983·Granted Aug 19, 1986·94 cites·10 claims
- 2493US4556378AApparatus for embossing high resolution relief patternsLANDIS & GYR AG·Filed 1984·Granted Dec 3, 1985·82 cites·14 claims
- 2592US4984824ADocument with an optical diffraction safety elementLANDIS & GYR AG·Filed 1989·Granted Jan 15, 1991·144 cites·11 claims
- 2692US4559495ATransducer free of any magnetic core for contactless current measurementLANDIS & GYR AG·Filed 1982·Granted Dec 17, 1985·65 cites·6 claims
- 2792US4544266AApparatus and a method for testing the authenticity of documentsLANDIS & GYR AG·Filed 1982·Granted Oct 1, 1985·190 cites·17 claims
- 2892US4163570AOptically coded document and method of making sameLANDIS & GYR AG·Filed 1977·Granted Aug 7, 1979·119 cites·7 claims
- 2991US5059776ABar code field and bar code readerLANDIS & GYR AG·Filed 1989·Granted Oct 22, 1991·96 cites·20 claims
- 3091US4970411AArrangement for improving the longterm stability of a Hall elementLANDIS & GYR AG·Filed 1989·Granted Nov 13, 1990·94 cites·16 claims
- 3191US4376887ADevice for the thermal erasure of mechanically readable optical markingsLANDIS & GYR AG·Filed 1979·Granted Mar 15, 1983·92 cites·11 claims
- 3290US4922109ADevice for recognizing authentic documents using optical modulasLANDIS & GYR AG·Filed 1989·Granted May 1, 1990·219 cites·11 claims
- 3390US4794326ATransducer for current measurementsLANDIS & GYR AG·Filed 1984·Granted Dec 27, 1988·66 cites·19 claims
- 3489US4580095ACurrent divider for a measuring transducerLANDIS & GYR AG·Filed 1983·Granted Apr 1, 1986·39 cites·9 claims
- 3589US4537504ASecurity blank with enhanced authenticating features, and a method and an apparatus for determining the genuineness of the security blankLANDIS & GYR AG·Filed 1982·Granted Aug 27, 1985·100 cites·47 claims
- 3688US4513273ATransducer for current measurementLANDIS & GYR AG·Filed 1984·Granted Apr 23, 1985·39 cites·11 claims
- 3788US4307380ATransmitting signals over alternating current power networksLANDIS & GYR AG·Filed 1977·Granted Dec 22, 1981·91 cites·20 claims
- 3887US11644492B2Electricity meter thermal performance monitoringLANDIS & GYR AG·Filed 2019·Granted May 9, 2023·3 cites·17 claims
- 3987US4385273ATransducer for measuring a current-generated magnetic fieldLANDIS & GYR AG·Filed 1980·Granted May 24, 1983·50 cites·16 claims
- 4087US4129382AMethod and apparatus for storing and reading authenticating informationLANDIS & GYR AG·Filed 1976·Granted Dec 12, 1978·46 cites·8 claims
- 4186US4749939AMeasuring transformer for measuring of a current flowing in an electrical conductorLANDIS & GYR AG·Filed 1986·Granted Jun 7, 1988·36 cites·19 claims
- 4286US4464625AMagnetoresistive current detectorLANDIS & GYR AG·Filed 1981·Granted Aug 7, 1984·46 cites·7 claims
- 4385US6555997B1Electricity meter and an input module for an electricity meterLANDIS & GYR AG·Filed 1999·Granted Apr 29, 2003·68 cites·9 claims
- 4485US4864238ADevice for measuring weak magnetic fluxes utilizing planar technologyLANDIS & GYR AG·Filed 1987·Granted Sep 5, 1989·55 cites·3 claims
- 4585US4520311ACurrent to pulse-sequence transducerLANDIS & GYR AG·Filed 1982·Granted May 28, 1985·31 cites·8 claims
- 4684US4853620ACircuit arrangement comprising multiplier circuits to find the sum of electrical power outputs for application in multi-phase electricity metersLANDIS & GYR AG·Filed 1988·Granted Aug 1, 1989·49 cites·4 claims
- 4784US4506372AMethod and apparatus for recognizing in a receiver the start of a telegram signal consisting of a bit impulse sequenceLANDIS & GYR AG·Filed 1982·Granted Mar 19, 1985·58 cites·13 claims
- 4884US4356553AMethod for the measuring of electrical powerLANDIS & GYR AG·Filed 1979·Granted Oct 26, 1982·42 cites·8 claims
- 4984US4291377AApparatus for measuring electrical powerLANDIS & GYR AG·Filed 1979·Granted Sep 22, 1981·36 cites·11 claims
- 5082US4371867ATransmitting signals over alternating current power networksLANDIS & GYR AG·Filed 1980·Granted Feb 1, 1983·66 cites·14 claims
Showing the top 50 of 139 patent records by PatentIndex Score.
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