Inventor · disambiguated record
Ritsuo Koga
Also filed as: KOGA RITSUO
10 granted patents·174 citations·filing 1987–2021
86Inventor score
Top patents by PatentIndex Score
10 records- 0185US6129437AImage display apparatusPLUS KK·Filed 1997·Granted Oct 10, 2000·101 cites·30 claims
- 0280US10046592B2Magnetic penZERO LAB CO LTD·Filed 2017·Granted Aug 14, 2018·2 cites·18 claims
- 0378US6340237B1Lamp cartridgePLUS KK·Filed 1998·Granted Jan 22, 2002·57 cites·28 claims
- 0467US10442236B2Magnetic penZERO LAB CO LTD·Filed 2018·Granted Oct 15, 2019·1 cites·20 claims
- 0564US11769429B2Magnetic erasing deviceZERO LAB CO LTD·Filed 2021·Granted Sep 26, 2023·0 cites·20 claims
- 0654US10997880B2Magnetic erasing deviceZERO LAB CO LTD·Filed 2017·Granted May 4, 2021·0 cites·20 claims
- 0752US11335487B2Magnetic eraser, writing system and display deviceZERO LAB CO LTD·Filed 2019·Granted May 17, 2022·0 cites·23 claims
- 0847US4979813AOpaque projectorPLUS KK·Filed 1989·Granted Dec 25, 1990·7 cites·18 claims
- 0937US4802014APortable transfer apparatusPLUS KK·Filed 1987·Granted Jan 31, 1989·6 cites·8 claims
- 1027US5803449AAutomatic manuscript sheet feederPLUS KK·Filed 1995·Granted Sep 8, 1998·0 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →