Inventor · disambiguated record
Robert M. Pettigrew
Also filed as: PETTIGREW ROBERT M · PETTIGREW ROBERT MARTIN
28 granted patents·2 pending applications·2,136 citations·filing 1975–2004
98Inventor score
Files withHEIDENHAIN GMBH DR JOHANNES4SYNAPTICS UK LTD3ARES SERONO NV2NAT RES DEV2PETTIGREW ROBERT M2
Top patents by PatentIndex Score
30 records- 0197US7030782B2Position detectorSYNAPTICS UK LTD·Filed 2004·Granted Apr 18, 2006·157 cites·17 claims
- 0297US6489899B1Position detectorSYNAPTICS UK LTD·Filed 2000·Granted Dec 3, 2002·171 cites·62 claims
- 0396US5160943APrinting systemsESSELTE METO INT GMBH·Filed 1988·Granted Nov 3, 1992·150 cites·10 claims
- 0496US4940966AArticle detection and/or recognition using magnetic devicesSCIENT GENERICS LTD·Filed 1988·Granted Jul 10, 1990·182 cites·6 claims
- 0596US4931384AOptical assay techniqueARES SERONO NV·Filed 1984·Granted Jun 5, 1990·318 cites·82 claims
- 0696US4776701ADisplacement measuring apparatus and methodHEIDENHAIN GMBH DR JOHANNES·Filed 1985·Granted Oct 11, 1988·89 cites·13 claims
- 0795US6249234B1Position detectorABSOLUTE SENSORS LTD·Filed 1998·Granted Jun 19, 2001·157 cites·11 claims
- 0895US5118608AOptical assay techniqueARES SERONO NV·Filed 1989·Granted Jun 2, 1992·202 cites·16 claims
- 0995US4960651AMagnetic devicesSCIENT GENERICS LTD·Filed 1988·Granted Oct 2, 1990·135 cites·57 claims
- 1091US6624916B1Signalling systemQUANTUMBEAM LTD·Filed 1998·Granted Sep 23, 2003·161 cites·109 claims
- 1187US5877800AOptical data recording apparatus and methodICI PLC·Filed 1994·Granted Mar 2, 1999·49 cites·14 claims
- 1287US4703469AOptical data recording using radiation of different characteristicsPLASMON DATA SYSTEMS P V·Filed 1984·Granted Oct 27, 1987·39 cites·5 claims
- 1387US4616237AData storage mediumPA MANAGEMENT CONSULT·Filed 1983·Granted Oct 7, 1986·34 cites·32 claims
- 1486US4636076ADisplacement measuring apparatus and methodHEIDENHAIN GMBH DR JOHANNES·Filed 1984·Granted Jan 13, 1987·35 cites·18 claims
- 1580US4486870AOptical data storagePETTIGREW ROBERT M·Filed 1982·Granted Dec 4, 1984·55 cites·52 claims
- 1678US4893299AMagneto-optic data storage techniqueHUMBERSTONE VICTOR C·Filed 1984·Granted Jan 9, 1990·31 cites·7 claims
- 1777US4051367AMeasurement apparatusNAT RES DEV·Filed 1975·Granted Sep 27, 1977·29 cites·23 claims
- 1873US5149211APrinters and ancillary systemsPETTIGREW ROBERT M·Filed 1990·Granted Sep 22, 1992·54 cites·9 claims
- 1971US4049965AMeasurement apparatusNAT RES DEV·Filed 1975·Granted Sep 20, 1977·15 cites·23 claims
- 2065US4657780AManufacture of diffraction gratingsHEIDENHAIN GMBH DR JOHANNES·Filed 1985·Granted Apr 14, 1987·17 cites·13 claims
- 2161US4928132AOptical data storage mediumPLASMON DATA SYSTEMS·Filed 1988·Granted May 22, 1990·14 cites·19 claims
- 2257US4758307AMethod of manufacturing a data storage mediumPLASMON DATA SYSTEMS NV·Filed 1986·Granted Jul 19, 1988·8 cites·20 claims
- 2349US4522482AInformation storage and retrievalCOMTECH RESEARCH·Filed 1982·Granted Jun 11, 1985·13 cites·60 claims
- 2446US4724444AData storage mediumPLASMON DATA SYSTEMS INC·Filed 1986·Granted Feb 9, 1988·7 cites·12 claims
- 2544US2003062889A1Position detectorSYNAPTICS UK LTD·Filed 2002·Application pending·0 cites
- 2640US4786585AImage forming and data storagePLASMON DATA SYSTEMS INC·Filed 1986·Granted Nov 22, 1988·4 cites·21 claims
- 2737US2002141011A1Optical free space signalling systemFiled 2001·Application pending·0 cites
- 2834US4733968ADatum sensing using optical gratingHEIDENHAIN GMBH DR JOHANNES·Filed 1986·Granted Mar 29, 1988·3 cites·5 claims
- 2932US4541695AZoom lens for camerasANGENIEUX P ETS·Filed 1983·Granted Sep 17, 1985·5 cites·14 claims
- 3029US4802736AInterferometersPLASMON DATA SYSTEMS NV·Filed 1986·Granted Feb 7, 1989·2 cites·12 claims
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