Inventor · disambiguated record
Keiichi Hirayama
Also filed as: HIRAYAMA KEIICHI
3 granted patents·57 citations·filing 1985–1990
73Inventor score
Technology areasH04N
Files withNEC CORP3
Top patents by PatentIndex Score
3 records- 0163US4985756ASpecial effect system for video signalNEC CORP·Filed 1988·Granted Jan 15, 1991·20 cites·4 claims
- 0258US5121210AVideo composing system using special effect apparatusNEC CORP·Filed 1990·Granted Jun 9, 1992·22 cites·2 claims
- 0355US4774507ASpecial video effect systemNEC CORP·Filed 1985·Granted Sep 27, 1988·15 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →