KH

Keiji Hatakeyama

KT Kabushiki Kaisha Toshiba: 2 patents #9,982 of 21,451Top 50%
TT Toshiba Lighting & Technology: 2 patents #203 of 486Top 45%
SC Sumitomo Cement Co.: 1 patents #32 of 113Top 30%
Overall (All Time): #1,286,721 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
5801483 Fluorescent lamp having visible and UV radiation Miho Watanabe, Hisashi Honda, Yuichi Sakakiabra, Akiko Saitou 1998-09-01
5227693 Fluorescent lamp with UV suppressing film and its manufacturing method Yuichi Sakakibara, Kunihiko Ikada 1993-07-13
5051650 Ultraviolet-suppressed light source, coating agent used in the same, and method for manufacturing the same Akira Taya, Kanehiro Saito, Mitsumasa Saito, Kazuhiko Osada 1991-09-24
4663563 Halophosphate phosphor and fluorescent lamp using the same Akira Taya, Kazuo Narita, Yasuhiko Hagiwara 1987-05-05