Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6497978 | Explosion-proof safety valve assemblage for a secondary battery | Akiyoshi Takada, Kazuo Yoshida, Nobuyuki Yoshimoto, Yoshihiko Isobe | 2002-12-24 |
| 6444348 | Battery sealing plate coated with protective film and battery sealed with the same | Hiromasa Suzuki | 2002-09-03 |
| 6440599 | Hermetically sealed cell | Akiyoshi Takada, Kazuo Yoshida, Nobuyuki Yoshimoto, Yoshihiko Isobe | 2002-08-27 |
| 6423440 | Closed battery and closing member | Akiyoshi Takada, Kazuo Yoshida, Nobuyuki Yoshimoto, Yoshihiko Isobe | 2002-07-23 |