Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5881355 | Fabrication method of cathode member and electronic tube equipped therewith | Toshikazu Sugimura, Taro Hirai, Shoichi Hata | 1999-03-09 |
| 5757115 | Cathode member and electron tube having the cathode member mounted thereon | Toshikazu Sugimura, Hiroyuki Sakatani, Tsuyoshi Tanabe | 1998-05-26 |
| 5306189 | Cathode impregnated by an electron emissive substance comprising (PBAO.QCAO).NBAA1204, where P>1, Q>0, N>1 | Toshikazu Sugimura | 1994-04-26 |