Inventor · disambiguated record
Keiji Hatakeyama
Also filed as: HATAKEYAMA KEIJI
4 granted patents·1 pending application·88 citations·filing 1986–2001
79Inventor score
Top patents by PatentIndex Score
5 records- 0177US5801483AFluorescent lamp having visible and UV radiationTOSHIBA LIGHTING & TECHNOLOGY·Filed 1996·Granted Sep 1, 1998·37 cites·22 claims
- 0259US5227693AFluorescent lamp with uv suppressing film and its manufacturing methodTOSHIBA LIGHTING & TECHNOLOGY·Filed 1991·Granted Jul 13, 1993·21 cites·11 claims
- 0354US4663563AHalophosphate phosphor and fluorescent lamp using the sameTOSHIBA KK·Filed 1986·Granted May 5, 1987·14 cites·5 claims
- 0451US5051650AUltraviolet-suppressed light source, coating agent used in the same, and method for manufacturing the sameTOSHIBA KK·Filed 1990·Granted Sep 24, 1991·16 cites·23 claims
- 0534US2002057059A1Fluorescent lamp, self-ballasted fluorescent lamp and lighting apparatusFiled 2001·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →