Assignee
SONY PREC TECHNOLOGY INC
US·28 granted patents·447 citations·filing 1998–2003
Top patents by PatentIndex Score
28 records- 0189US6578283B2Position transducerSONY PREC TECHNOLOGY INC·Filed 2001·Granted Jun 17, 2003·35 cites·4 claims
- 0285US6768426B2Position detection apparatusSONY PREC TECHNOLOGY INC·Filed 2003·Granted Jul 27, 2004·29 cites·3 claims
- 0380US6580264B2Position detector with magnetic core and detection and auxiliary coilsSONY PREC TECHNOLOGY INC·Filed 2001·Granted Jun 17, 2003·23 cites·3 claims
- 0479US6668996B2Electromagnetic clutchSONY PREC TECHNOLOGY INC·Filed 2002·Granted Dec 30, 2003·20 cites·1 claims
- 0577US6541960B2Position detector utilizing magnetic sensors and a bias magnetic field generatorSONY PREC TECHNOLOGY INC·Filed 2001·Granted Apr 1, 2003·19 cites·4 claims
- 0676US6980303B2Light-emitting/receiving combined unit and displacement sensors using the sameSONY PREC TECHNOLOGY INC·Filed 2002·Granted Dec 27, 2005·18 cites·8 claims
- 0772US6772101B1Position detection apparatus and arithmetic processing unitSONY PREC TECHNOLOGY INC·Filed 2000·Granted Aug 3, 2004·16 cites·14 claims
- 0870US6182191B1Recording and reproducing systemSONY PREC TECHNOLOGY INC·Filed 1998·Granted Jan 30, 2001·33 cites·17 claims
- 0969US6490807B1Position detection apparatusSONY PREC TECHNOLOGY INC·Filed 2000·Granted Dec 10, 2002·14 cites·2 claims
- 1069US6166817AOptical displacement measurement system for detecting the relative movement of a machine partSONY PREC TECHNOLOGY INC·Filed 1999·Granted Dec 26, 2000·27 cites·11 claims
- 1166US6879405B2Displacement pickupSONY PREC TECHNOLOGY INC·Filed 2003·Granted Apr 12, 2005·12 cites·39 claims
- 1266US6711109B1Method and apparatus for measuring the eccentricity of diskSONY PREC TECHNOLOGY INC·Filed 2000·Granted Mar 23, 2004·8 cites·4 claims
- 1366US6470292B1Position detection apparatusSONY PREC TECHNOLOGY INC·Filed 2000·Granted Oct 22, 2002·12 cites·2 claims
- 1463US6373239B1Position detecting apparatus utilizing a magnetic scale and sensorSONY PREC TECHNOLOGY INC·Filed 2000·Granted Apr 16, 2002·10 cites·4 claims
- 1562US6788053B2Magnetic flux measuring deviceSONY PREC TECHNOLOGY INC·Filed 2002·Granted Sep 7, 2004·11 cites·5 claims
- 1662US6409380B1Dew formation prediction method and apparatus, environment air temperature estimating method and apparatus and recording and/or reproducing apparatusSONY PREC TECHNOLOGY INC·Filed 2000·Granted Jun 25, 2002·9 cites·9 claims
- 1760US6145213APosition detection apparatusSONY PREC TECHNOLOGY INC·Filed 1999·Granted Nov 14, 2000·22 cites·2 claims
- 1858US6236200B1Magnetic metal sensor and method for detecting magnetic metalSONY PREC TECHNOLOGY INC·Filed 1998·Granted May 22, 2001·33 cites·7 claims
- 1958US6222361B1Position detecting device using varying width magneto-resistive effect sensorSONY PREC TECHNOLOGY INC·Filed 1998·Granted Apr 24, 2001·23 cites·5 claims
- 2054US6583948B1Disc recording/reproducing apparatus and servo signal writing apparatusSONY PREC TECHNOLOGY INC·Filed 1999·Granted Jun 24, 2003·11 cites·6 claims
- 2153US6931741B2Scale deviceSONY PREC TECHNOLOGY INC·Filed 2003·Granted Aug 23, 2005·7 cites·12 claims
- 2253US6693565B2Position transducerSONY PREC TECHNOLOGY INC·Filed 2003·Granted Feb 17, 2004·6 cites·2 claims
- 2353US6145214APosition detection apparatusSONY PREC TECHNOLOGY INC·Filed 1999·Granted Nov 14, 2000·19 cites·1 claims
- 2452US6407815B2Optical displacement measurement systemSONY PREC TECHNOLOGY INC·Filed 1999·Granted Jun 18, 2002·23 cites·13 claims
- 2547US6707775B1Method and apparatus for measuring crosstalk of optical discSONY PREC TECHNOLOGY INC·Filed 2000·Granted Mar 16, 2004·1 cites·5 claims
- 2646US6549003B2Position detector utilizing two magnetic field sensors and a scaleSONY PREC TECHNOLOGY INC·Filed 2001·Granted Apr 15, 2003·3 cites·2 claims
- 2740US6935043B2Scale device including means for preventing the occurence of small gaps between opposing walls of a guide openingSONY PREC TECHNOLOGY INC·Filed 2003·Granted Aug 30, 2005·2 cites·8 claims
- 2840US6772088B2Position transducerSONY PREC TECHNOLOGY INC·Filed 2003·Granted Aug 3, 2004·1 cites·4 claims
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