Inventor · disambiguated record

Ryoichi Umezawa

Also filed as: UMEZAWA RYOICHI

2 granted patents·17 citations·filing 1989–2013

51Inventor score

Technology areasB41J G11B

Files withCOPAL CO LTD1 NIDEC COPAL CORP1

Top patents by PatentIndex Score

2 records

0165US4991037AApparatus for manipulating a magnetic tape cartridge and the magnetic tape contained therewithinCOPAL CO LTD·Filed 1989·Granted Feb 5, 1991·17 cites·3 claims
0235US9024991B2Laser markerNIDEC COPAL CORP·Filed 2013·Granted May 5, 2015·0 cites·6 claims

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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →