Inventor · disambiguated record
Masaaki Tsukiji
Also filed as: TSUKIJI MASAAKI
22 granted patents·651 citations·filing 1983–1995
97Inventor score
Top patents by PatentIndex Score
22 records- 0194US5129725AMethod of optically detecting position of object and position detecting apparatus using the methodCANON KK·Filed 1991·Granted Jul 14, 1992·123 cites·11 claims
- 0293US5021649ARelief diffraction grating encoderCANON KK·Filed 1990·Granted Jun 4, 1991·81 cites·12 claims
- 0392US5066130ADisplacement measuring apparatusCANON KK·Filed 1989·Granted Nov 19, 1991·57 cites·31 claims
- 0489US4930895AEncoder for forming interference fringes by re-diffracted lights from an optical type scale and photoelectrically converting the interference fringes to thereby detect the displacement of the scaleCANON KK·Filed 1988·Granted Jun 5, 1990·48 cites·34 claims
- 0588US4979826ADisplacement measuring apparatusCANON KK·Filed 1989·Granted Dec 25, 1990·44 cites·22 claims
- 0679US4970388AEncoder with diffraction grating and multiply diffracted lightCANON KK·Filed 1989·Granted Nov 13, 1990·28 cites·30 claims
- 0777US5038032AEncoder incorporating a displaceable diffraction gratingCANON KK·Filed 1990·Granted Aug 6, 1991·33 cites·26 claims
- 0877US5000542AOptical type encoderCANON KK·Filed 1989·Granted Mar 19, 1991·26 cites·21 claims
- 0976US5026985AMethod and apparatus for detecting a reference position of a rotating scale with two sensorsCANON KK·Filed 1989·Granted Jun 25, 1991·24 cites·30 claims
- 1073US5051579AOptical scale encoder with light intensity alarmCANON KK·Filed 1990·Granted Sep 24, 1991·29 cites·9 claims
- 1171US5067089ADevice having signal interpolation circuit and displacement measuring apparatus comprising the deviceCANON KK·Filed 1989·Granted Nov 19, 1991·20 cites·20 claims
- 1267US5568337AHead positioning using a disk drive mounted to a rotating tableCANON KK·Filed 1995·Granted Oct 22, 1996·22 cites·6 claims
- 1361US5017777ADiffracted beam encoderCANON KK·Filed 1989·Granted May 21, 1991·14 cites·34 claims
- 1461US4975570ARotary encoder using multiple diffracted beams having co-incident pathsCANON KK·Filed 1990·Granted Dec 4, 1990·18 cites·32 claims
- 1559US4933673AEncoderCANON KK·Filed 1988·Granted Jun 12, 1990·15 cites·5 claims
- 1658US5198873AEncoder utilizing interference using multi-mode semiconductor laserCANON KK·Filed 1991·Granted Mar 30, 1993·16 cites·17 claims
- 1758USD279677SPrinterTOKYO JUKI INDUSTRIAL CO LTD·Filed 1983·Granted Jul 16, 1985·6 cites·1 claims
- 1857US5067813AOptical apparatus for measuring displacement of an objectCANON KK·Filed 1989·Granted Nov 26, 1991·12 cites·18 claims
- 1957US5038491AScale for use for measurement of the displacement of an object to be examined, and displacement measuring apparatusCANON KK·Filed 1989·Granted Aug 13, 1991·12 cites·6 claims
- 2054US4998798AEncoder having long length measuring strokeCANON KK·Filed 1989·Granted Mar 12, 1991·10 cites·15 claims
- 2148US4912320AOptical type encoder including diffraction grating for producing interference fringes that are processed to measure displacementCANON KK·Filed 1989·Granted Mar 27, 1990·8 cites·7 claims
- 2247USD286054SSewing machineTOKYO JUKI INDUSTRIAL CO LTD·Filed 1983·Granted Oct 7, 1986·5 cites·1 claims
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