Inventor · disambiguated record
Yukio Iigahama
Also filed as: GOTOH TAKESHI · IIGAHAMA YUKIO
8 granted patents·129 citations·filing 1995–2018
86Inventor score
Top patents by PatentIndex Score
8 records- 0179US5959704ADisplay device having diffraction gratingFUJITSU LTD·Filed 1996·Granted Sep 28, 1999·55 cites·19 claims
- 0276US6639642B1Display device having diffraction gratingFUJITSU LTD·Filed 2000·Granted Oct 28, 2003·12 cites·9 claims
- 0371US6211932B1Fresnel lens and liquid crystal display deviceFUJITSU LTD·Filed 2000·Granted Apr 3, 2001·12 cites·26 claims
- 0469US5751387AFresnel lens and liquid crystal display deviceFUJITSU LTD·Filed 1995·Granted May 12, 1998·41 cites·30 claims
- 0544US10423057B2Projection apparatus, projection system and spectacle-type display apparatusCOLORLINK JAPAN LTD·Filed 2018·Granted Sep 24, 2019·0 cites·20 claims
- 0640US9678362B2Optical device provided to an eye glass or a helmet having a voltage control unit that switches a voltage cyclicallyCOLORLINK JAPAN LTD·Filed 2015·Granted Jun 13, 2017·0 cites·18 claims
- 0740US6380994B1Fresnel lens and liquid crystal display deviceFUJITSU LTD·Filed 1997·Granted Apr 30, 2002·9 cites·19 claims
- 0832US9523866B2Optical device provided to an eye glass or a helmet having a frontal transmittance and a peripheral transmittanceCOLORLINK JAPAN LTD·Filed 2015·Granted Dec 20, 2016·0 cites·28 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →