SO

Seiji Oka

Mitsubishi Electric: 32 patents #398 of 25,717Top 2%
Ricoh Company: 18 patents #1,197 of 9,818Top 15%
DI Daikin Industries: 4 patents #820 of 2,957Top 30%
OM Omron: 3 patents #980 of 3,089Top 35%
Overall (All Time): #42,731 of 4,157,543Top 2%
57
Patents All Time

Issued Patents All Time

Showing 51–57 of 57 patents

Patent #TitleCo-InventorsDate
4969557 Toner cartridge 1990-11-13
4882389 Electrical insulating resin Makoto Doi, Hiroyukio Nakajima, Fumiyuki Miyamoto, Mitsuhiro Nonogaki 1989-11-21
4799608 Toner cartridge 1989-01-24
4800411 Magnetic brush development device for electrostatic latent images Masaru Tanaka 1989-01-24
4650070 Toner cartridge Yoshiharu Morita 1987-03-17
4603180 Thermosetting resin composition Hiroyuki Nakajima, Fumiyuki Miyamoto, Masakazu Murayama, Eiki Jidai 1986-07-29
4591623 Thermosetting resin composition Hiroyuki Nakajima, Fumiyuki Miyamoto, Masakazu Murayama, Eiki Jidai 1986-05-27