Inventor · disambiguated record
Willem G. Opheij
Also filed as: OPHEIJ WILLEM G · OPHEIJ WILLEM GERARD
31 granted patents·929 citations·filing 1977–1997
98Inventor score
Files withPHILIPS CORP30
Top patents by PatentIndex Score
31 records- 0197US4862447AOptical record carrier with surface layer extending to the center of a substantially circular information track structure thereinPHILIPS CORP·Filed 1988·Granted Aug 29, 1989·75 cites·5 claims
- 0297US4761776ADevice for determining a centring error of an optical disc relative to the axis of rotation of a turntable supporting the discPHILIPS CORP·Filed 1986·Granted Aug 2, 1988·75 cites·15 claims
- 0395US4864118AOptical scanning unit with tracking error detectionPHILIPS CORP·Filed 1988·Granted Sep 5, 1989·75 cites·6 claims
- 0494US4546463AApparatus for recording and reading information tracks on an optical record carrier with a beam of radiationPHILIPS CORP·Filed 1981·Granted Oct 8, 1985·48 cites·17 claims
- 0593US4868373AMemory card comprising an optical memory disc and microelectronic memory component, and apparatus for transferring information to and from such cardPHILIPS CORP·Filed 1986·Granted Sep 19, 1989·162 cites·18 claims
- 0692US4918679AOptical record carrier scanning apparatus providing optoelectronic positioning of the scanning spotPHILIPS CORP·Filed 1988·Granted Apr 17, 1990·60 cites·17 claims
- 0786US4423496AApparatus for reading and/or writing an optically readable information structurePHILIPS CORP·Filed 1980·Granted Dec 27, 1983·28 cites·7 claims
- 0885US5204516APlanar optical scanning head having deficiency-correcting gratingPHILIPS CORP·Filed 1991·Granted Apr 20, 1993·35 cites·17 claims
- 0982US5854780AOptical scanning device using a plurality of scanning spotsPHILIPS CORP·Filed 1993·Granted Dec 29, 1998·33 cites·13 claims
- 1082US4826270AOptical scanning apparatusPHILIPS CORP·Filed 1988·Granted May 2, 1989·29 cites·17 claims
- 1181US6052237AObjective lens and scanning device using such an objective lensPHILIPS CORP·Filed 1997·Granted Apr 18, 2000·34 cites·6 claims
- 1277US4460990AApparatus for reading an optical record carrierPHILIPS CORP·Filed 1982·Granted Jul 17, 1984·19 cites·4 claims
- 1376US4473829AMethod of recording a digital information signal on a record carrier having a radiation-sensitive information layer, apparatus for carrying out the method, and optical record carrier provided with such a digital information signalPHILIPS CORP·Filed 1982·Granted Sep 25, 1984·18 cites·10 claims
- 1475US5191221AOptical device determining the position and orientation of an object, and optical recording and/or reproducing apparatus including the devicePHILIPS CORP·Filed 1990·Granted Mar 2, 1993·23 cites·31 claims
- 1574US4924079AApparatus for optically scanning an information planePHILIPS CORP·Filed 1989·Granted May 8, 1990·23 cites·36 claims
- 1673US4374324AOptical focussing device with inclination detectionPHILIPS CORP·Filed 1980·Granted Feb 15, 1983·16 cites·3 claims
- 1769US5712841AOptical unit having a radiation source, a detector and a grating, and scanning device including the optical unitFiled 1996·Granted Jan 27, 1998·29 cites·23 claims
- 1869US4835380AScanning device for an optical recording and/or reproducing apparatusPHILIPS CORP·Filed 1987·Granted May 30, 1989·27 cites·14 claims
- 1969US4135207AApparatus for reading an optical radiation-reflecting record carrier including a narrow focus control beamPHILIPS CORP·Filed 1977·Granted Jan 16, 1979·13 cites·9 claims
- 2066US5146080APlanar optical scanning head with concentric diffraction gratingsPHILIPS CORP·Filed 1991·Granted Sep 8, 1992·15 cites·20 claims
- 2165US5245182AOptical recording and/or reproducing apparatus with optical sensing of scanning mirror positionPHILIPS CORP·Filed 1992·Granted Sep 14, 1993·15 cites·13 claims
- 2264US5068751AThree element grating objective and grating-beam shaper, and optical scanning devicePHILIPS CORP·Filed 1990·Granted Nov 26, 1991·14 cites·21 claims
- 2361US5579298AOptical scanner having symmetry about an oblique dividerPHILIPS CORP·Filed 1996·Granted Nov 26, 1996·15 cites·21 claims
- 2460US4253019AApparatus for reading an optical record carrier having a radiation-reflecting information structurePHILIPS CORP·Filed 1978·Granted Feb 24, 1981·9 cites·9 claims
- 2555US4810871AElectronically adjustable position-sensitive radiation detector and optical systems using samePHILIPS CORP·Filed 1986·Granted Mar 7, 1989·9 cites·7 claims
- 2653US4940890AOptical scanning device, mirror objective suitable for use in said device and optical write and/or read apparatus provided with said devicePHILIPS CORP·Filed 1989·Granted Jul 10, 1990·8 cites·15 claims
- 2753US4924082AOptical scanning device, mirror objective suitable for use in said device and optical write and/or read apparatus provided with said devicePHILIPS CORP·Filed 1989·Granted May 8, 1990·7 cites·18 claims
- 2845US5144131ADevice for optically scanning an information plane detecting border portions of light beamPHILIPS CORP·Filed 1991·Granted Sep 1, 1992·7 cites·20 claims
- 2939US5029255AOptical scanning device including mirror objective having two windows at least one having an aspherical surfacePHILIPS CORP·Filed 1989·Granted Jul 2, 1991·4 cites·26 claims
- 3036US4270045AApparatus for reading an optical radiation-reflecting information carrier for controlling focusPHILIPS CORP·Filed 1977·Granted May 26, 1981·2 cites·6 claims
- 3133US4810073AOptical scanning apparatusPHILIPS CORP·Filed 1987·Granted Mar 7, 1989·2 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →