Inventor · disambiguated record
Katsuyuki Katayama
Also filed as: KATAYAMA KATSUYUKI
3 granted patents·3 pending applications·28 citations·filing 1996–2013
69Inventor score
Top patents by PatentIndex Score
6 records- 0182US8334794B2Input device and keyboard device having illumination functionWATANABE KAZUTOSHI·Filed 2009·Granted Dec 18, 2012·13 cites·24 claims
- 0246USD386488SData entry keyboardALPS ELECTRIC CO LTD·Filed 1996·Granted Nov 18, 1997·6 cites·1 claims
- 0340US2008175022A1Illuminating unitSUGIURA TAKURO·Filed 2007·Application pending·0 cites
- 0440US2013199911A1Membrane switch unit and keyboard device including the membrane switch unitALPS ELECTRIC CO LTD·Filed 2013·Application pending·0 cites
- 0534US6087604AThin keyboardALPS ELECTRIC CO LTD·Filed 1999·Granted Jul 11, 2000·9 cites·4 claims
- 0628US2002079211A1Key switch with click elastic member placed between key top and switch elementFiled 2001·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →