Inventor · disambiguated record
Masaichi Nagai
Also filed as: NAGAI MASAICHI
13 granted patents·331 citations·filing 1985–1998
93Inventor score
Files withHITACHI LTD13
Top patents by PatentIndex Score
13 records- 0195US4651172AInformation recording mediumHITACHI LTD·Filed 1985·Granted Mar 17, 1987·78 cites·18 claims
- 0283US5572502AOptical disk apparatusHITACHI LTD·Filed 1994·Granted Nov 5, 1996·38 cites·10 claims
- 0376US5475656AOptical disk memory and information processing apparatusHITACHI LTD·Filed 1991·Granted Dec 12, 1995·25 cites·23 claims
- 0475US5420845AMethods of varying optical properties, optical devices, information recording media and information recording methods and apparatusesHITACHI LTD·Filed 1992·Granted May 30, 1995·39 cites·27 claims
- 0575US5371730AOptical memory and information processing apparatusHITACHI LTD·Filed 1990·Granted Dec 6, 1994·23 cites·23 claims
- 0675US5187052AOptical recording mediumHITACHI LTD·Filed 1992·Granted Feb 16, 1993·23 cites·5 claims
- 0772US5317556AInformation processing apparatus and optical head incorporated thereinHITACHI LTD·Filed 1990·Granted May 31, 1994·21 cites·29 claims
- 0864US5484686AOptical recording media and information recording and reproducing unitsHITACHI LTD·Filed 1994·Granted Jan 16, 1996·21 cites·5 claims
- 0963US5583840AROM type optical recording medium with a high reflectivity and an optical head operable on ROM, write-one and rewritable diskHITACHI LTD·Filed 1994·Granted Dec 10, 1996·14 cites·36 claims
- 1060US5274612AInformation processor and disk memory used in the sameHITACHI LTD·Filed 1991·Granted Dec 28, 1993·13 cites·12 claims
- 1157US6127210AManufacturing method of CMOS thin film semiconductor device and CMOS thin film semiconductor device manufactured therebyHITACHI LTD·Filed 1996·Granted Oct 3, 2000·25 cites·13 claims
- 1241US4668591AMagnetic separator matrix of cut pieces of an elongated crystalline magnetic alloyHITACHI LTD·Filed 1985·Granted May 26, 1987·8 cites·3 claims
- 1332USRE36624EOptical recording media and information recording and reproducing unitsHITACHI LTD·Filed 1998·Granted Mar 21, 2000·3 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →