Inventor · disambiguated record
Koyo Hasegawa
Also filed as: HASEGAWA KOYO · HASEGAWA KOYO OVS
20 granted patents·1,091 citations·filing 1989–2009
96Inventor score
Top patents by PatentIndex Score
20 records- 0193US7286825B2Method for communication among mobile units and vehicular communication apparatusALPINE ELECTRONICS INC·Filed 2003·Granted Oct 23, 2007·121 cites·20 claims
- 0289US5577266ABroadcast system with associated data capabilitiesDIGITAL D J INC·Filed 1995·Granted Nov 19, 1996·274 cites·10 claims
- 0389US5398227AMagnetooptical recording reproducing apparatus and method for determining the power of an irradiating light beam on the basis of a detected amplitude of a recording signalCANON KK·Filed 1993·Granted Mar 14, 1995·46 cites·22 claims
- 0488US5812937ABroadcast data system with multiple-tuner receiverDIGITAL DJ INC·Filed 1996·Granted Sep 22, 1998·272 cites·12 claims
- 0585US5485435AMagnetic field generator in which an end face of a magnetic material member projects from man end face of magnetic field generating coresCANON KK·Filed 1994·Granted Jan 16, 1996·38 cites·26 claims
- 0685US5428586AMagneto-optical recording method using a magneto-optical recording medium having two or more magnetic layers to allow recording and reproduction to be effected simultaneously and magneto-optical recording medium used in the methodCANON KK·Filed 1994·Granted Jun 27, 1995·39 cites·8 claims
- 0783US5946605AMethod and apparatus for communicating information using a data tunerDIGITAL DJ·Filed 1996·Granted Aug 31, 1999·112 cites·1 claims
- 0882US5233578AMethod of recording information on a recording medium having at least two magnetic layersCANON KK·Filed 1992·Granted Aug 3, 1993·32 cites·27 claims
- 0974US5661612AMagnetic head driving device and magnetooptical recording apparatusCANON KK·Filed 1994·Granted Aug 26, 1997·27 cites·14 claims
- 1066US8457814B2Radar monitoring deviceHASEGAWA KOYO·Filed 2009·Granted Jun 4, 2013·8 cites·13 claims
- 1166US5293360AMagnetic field generating deviceCANON KK·Filed 1992·Granted Mar 8, 1994·16 cites·8 claims
- 1265US4896025AInformation reproducing apparatus for information recording medium having a plurality of information tracksCANON KK·Filed 1989·Granted Jan 23, 1990·13 cites·11 claims
- 1364US5394380AMagneto-optic recording apparatus and method thereforCANON KK·Filed 1993·Granted Feb 28, 1995·14 cites·11 claims
- 1463US7260108B2Multimedia information providing method and apparatusALPINE ELECTRONICS INC·Filed 2002·Granted Aug 21, 2007·5 cites·12 claims
- 1562US5717506AImage communication apparatus for communicating binary and multi-value color image dataCANON KK·Filed 1995·Granted Feb 10, 1998·26 cites·19 claims
- 1662US5434831AMagneto-optical recording apparatus capable of both magnetic modulation and light modulation recordingCANON KK·Filed 1994·Granted Jul 18, 1995·13 cites·44 claims
- 1753US5051974AOptical head device having a light splitter with a diffraction grating structureCANON KK·Filed 1989·Granted Sep 24, 1991·15 cites·11 claims
- 1844US5555236AMagneto-optical recording method of erasing a portion of a first recording domain to form a crescent-shaped second recording domainCANON KK·Filed 1995·Granted Sep 10, 1996·6 cites·4 claims
- 1941US5668872AInformation processing method and systemCANON KK·Filed 1995·Granted Sep 16, 1997·8 cites·19 claims
- 2038US4912311AInformation recording carrierCANON KK·Filed 1989·Granted Mar 27, 1990·6 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →