Inventor · disambiguated record
Yoshihiro Hamakawa
Also filed as: HAMAKAWA YOSHIHIRO
41 granted patents·1 pending application·1,483 citations·filing 1980–2003
98Inventor score
Files withHITACHI LTD14KANEGAFUCHI CHEMICAL IND11HAMAKAWA YOSHIHIRO8CLEAN VENTURE 21 CORP2MINOLTA CO LTD2
Top patents by PatentIndex Score
42 records- 0196US5419781AFlexible photovoltaic deviceKANEGAFUCHI CHEMICAL IND·Filed 1994·Granted May 30, 1995·135 cites·14 claims
- 0296US4881144AThin film magnetic headHITACHI LTD·Filed 1988·Granted Nov 14, 1989·77 cites·12 claims
- 0396US4496788APhotovoltaic deviceOSAKA TRANSFORMER CO LTD·Filed 1983·Granted Jan 29, 1985·143 cites·35 claims
- 0495US4612409AFlexible photovoltaic deviceKANEGAFUCHI CHEMICAL IND·Filed 1982·Granted Sep 16, 1986·80 cites·3 claims
- 0593US6706959B2Photovoltaic apparatus and mass-producing apparatus for mass-producing spherical semiconductor particlesCLEAN VENTURE 21 CORP·Filed 2001·Granted Mar 16, 2004·97 cites·17 claims
- 0692US4814921AMultilayered magnetic films and thin-film magnetic heads using the same as a poleHITACHI LTD·Filed 1988·Granted Mar 21, 1989·61 cites·18 claims
- 0791US4634601AMethod for production of semiconductor by glow discharge decomposition of silaneKANEGAFUCHI CHEMICAL IND·Filed 1985·Granted Jan 6, 1987·100 cites·2 claims
- 0888US5461526AMagnetoresistive read head and magnetic storage system using the sameHITACHI LTD·Filed 1993·Granted Oct 24, 1995·46 cites·17 claims
- 0987US4773942AFlexible photovoltaic deviceKANEGAFUCHI CHEMICAL IND·Filed 1986·Granted Sep 27, 1988·41 cites·11 claims
- 1087US4450316AAmorphous silicon photovoltaic device having two-layer transparent electrodeKANEGAFUCHI CHEMICAL IND·Filed 1982·Granted May 22, 1984·44 cites·4 claims
- 1186US5127964AFlexible photovoltaic deviceKANEGAFUCHI CHEMICAL IND·Filed 1991·Granted Jul 7, 1992·53 cites·1 claims
- 1285US4388482AHigh-voltage photovoltaic cell having a heterojunction of amorphous semiconductor and amorphous siliconHAMAKAWA YOSHIHIRO·Filed 1981·Granted Jun 14, 1983·49 cites·13 claims
- 1384US5686734AThin film semiconductor device and photoelectric conversion device using the thin film semiconductor deviceCANON KK·Filed 1995·Granted Nov 11, 1997·58 cites·24 claims
- 1484US5126907AThin film magnetic head having at least one magnetic core member made at least partly of a material having a high saturation magnetic flux densityHITACHI LTD·Filed 1990·Granted Jun 30, 1992·38 cites·23 claims
- 1578US5843589AMagnetic layered material, and magnetic sensor and magnetic storage/read system based thereonHITACHI LTD·Filed 1996·Granted Dec 1, 1998·41 cites·31 claims
- 1678US5235591AStack type optical disc apparatus, sealed and separate type optical head therefor and optical disc mediumHITACHI LTD·Filed 1991·Granted Aug 10, 1993·27 cites·34 claims
- 1778US4820915AColor sensor with amorphous pin structureYAMATAKE HONEYWELL CO LTD·Filed 1987·Granted Apr 11, 1989·44 cites·8 claims
- 1878US4760481AThin film magnetic head having an improved coilHITACHI LTD·Filed 1986·Granted Jul 26, 1988·25 cites·6 claims
- 1978US4410559AMethod of forming amorphous silicon filmsHAMAKAWA YOSHIHIRO·Filed 1981·Granted Oct 18, 1983·30 cites·9 claims
- 2078US4271328APhotovoltaic deviceHAMAKAWA YOSHIHIRO·Filed 1980·Granted Jun 2, 1981·34 cites·19 claims
- 2176US4544423AAmorphous silicon semiconductor and process for sameKANEGAFUCHI CHEMICAL IND·Filed 1984·Granted Oct 1, 1985·38 cites·8 claims
- 2275US6515837B1Magnetoresistive head and magnetic storage apparatusHITACHI LTD·Filed 2000·Granted Feb 4, 2003·11 cites·13 claims
- 2372US6087027AMagnetic layered material, and magnetic sensor and magnetic storage/read system based thereonHITACHI LTD·Filed 1998·Granted Jul 11, 2000·23 cites·12 claims
- 2470US4385200APhotovoltaic cell having a hetero junction of amorphous silicon carbide and amorphous siliconHAMAKAWA YOSHIHIRO·Filed 1982·Granted May 24, 1983·22 cites·6 claims
- 2568US4385199APhotovoltaic cell having a hetero junction of amorphous silicon carbide and amorphous siliconHAMAKAWA YOSHIHIRO·Filed 1981·Granted May 24, 1983·20 cites·6 claims
- 2663US5021103AMethod of forming microcrystalline silicon-containing silicon carbide filmNIPPON SOKEN·Filed 1990·Granted Jun 4, 1991·24 cites·5 claims
- 2762US4499331AAmorphous semiconductor and amorphous silicon photovoltaic deviceKANEGAFUCHI CHEMICAL IND·Filed 1983·Granted Feb 12, 1985·13 cites·5 claims
- 2861US4875943AFlexible photovoltaic deviceKANEGAFUCHI CHEMICAL IND·Filed 1988·Granted Oct 24, 1989·11 cites·10 claims
- 2960US4943879AThin film magnetic head including magnetic layers having high saturation magnetic flux density and metal film for avoiding deterioration during manufacturingHITACHI LTD·Filed 1987·Granted Jul 24, 1990·11 cites·17 claims
- 3060US4762755AFerromagnetic material and a magnetic head using the same materialHITACHI LTD·Filed 1984·Granted Aug 9, 1988·14 cites·25 claims
- 3156US4766039AMagnetic head made from amorphous magnetic filmHITACHI LTD·Filed 1986·Granted Aug 23, 1988·9 cites·19 claims
- 3255US6327123B1Magnetic head employing magnetoresistive sensor and magnetic storage and retrieval systemHITACHI LTD·Filed 1999·Granted Dec 4, 2001·11 cites·14 claims
- 3353US4453184ASolid state imaging deviceFUJI PHOTO FILM CO LTD·Filed 1981·Granted Jun 5, 1984·13 cites·16 claims
- 3450US5719729AMagnetic head and recording and reproducing apparatus having an arrangement for improving coincidence between a magnetic center of a read head and physical center of a write headHITACHI LTD·Filed 1992·Granted Feb 17, 1998·8 cites·4 claims
- 3548US4491682AAmorphous silicon photovoltaic device including a two-layer transparent electrodeKANEGAFUCHI CHEMICAL IND·Filed 1983·Granted Jan 1, 1985·7 cites·11 claims
- 3641US4735396ASubstrate for manufacturing single crystal thin filmsHAMAKAWA YOSHIHIRO·Filed 1985·Granted Apr 5, 1988·6 cites·2 claims
- 3740US5942788ASolid state image sensing deviceMINOLTA CO LTD·Filed 1996·Granted Aug 24, 1999·7 cites·30 claims
- 3840US4717630ASubstrate for manufacturing single crystal thin filmsHAMAKAWA YOSHIHIRO·Filed 1986·Granted Jan 5, 1988·6 cites·1 claims
- 3936US2006162763A1Photovoltaic apparatus and mass-producing apparatus for mass-producing spherical semiconductor particlesCLEAN VENTURE 21 CORP·Filed 2003·Application pending·0 cites
- 4035US4758399ASubstrate for manufacturing single crystal thin filmsHAMAKAWA YOSHIHIRO·Filed 1986·Granted Jul 19, 1988·4 cites·1 claims
- 4132US5976906AMethod for manufacturing a solid state image sensing deviceMINOLTA CO LTD·Filed 1996·Granted Nov 2, 1999·2 cites·12 claims
- 4230US4670762AAmorphous silicon semiconductor and process for sameKANEGAFUCHI CHEMICAL IND·Filed 1985·Granted Jun 2, 1987·0 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →