Inventor · disambiguated record
Tsugio Tokumasu
Also filed as: TOKUMASU TSUGIO
7 granted patents·86 citations·filing 1989–2004
85Inventor score
Technology areasG02F
Top patents by PatentIndex Score
7 records- 0167US7280264B2Magneto-optical deviceFDK CORP·Filed 2004·Granted Oct 9, 2007·11 cites·19 claims
- 0266US7006273B2Faraday rotation device and optical device using sameFDK CORP·Filed 2004·Granted Feb 28, 2006·9 cites·26 claims
- 0364US5105307AOptical isolatorFUJI ELECTROCHEMICAL CO LTD·Filed 1989·Granted Apr 14, 1992·26 cites·10 claims
- 0461US6876480B2Farady rotation device and optical device comprising itFDK CORP·Filed 2001·Granted Apr 5, 2005·7 cites·36 claims
- 0557US5521741APolarization plane switch and optical switching device using the sameFDK CORP·Filed 1995·Granted May 28, 1996·28 cites·8 claims
- 0651US7050232B2Optical circulator and optical switchFDK CORP·Filed 2001·Granted May 23, 2006·5 cites·10 claims
- 0738US7050216B2Variable optical filterFDK CORP·Filed 2004·Granted May 23, 2006·0 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →