Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4890033 | Light-emitting composition and fluorescent lamp | Keizi Ichinomiya, Kouichi Okada, Yuji Itsuki | 1989-12-26 |
| 4423349 | Green fluorescence-emitting material and a fluorescent lamp provided therewith | Shigeharu Nakajima, Keiji Ichinomiya, Koichi Okada, Minoru Kashiwagi | 1983-12-27 |