Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7765924 | Stamp | — | 2010-08-03 |
| 6440549 | Printing sheet for stamp | Keiji Seo, Takashi Okumura, Koji Sugiyama | 2002-08-27 |
| 6311618 | Stamp unit with a circumference portion covered by a sealant | Takashi Okumura, Hiroshi Takami, Teruo Imamaki, Minoru Yamamoto, Keiji Seo +1 more | 2001-11-06 |
| 6112662 | Stamp unit | Takashi Okumura, Hiroshi Takami, Teruo Imamaki, Minoru Yamamoto, Keiji Seo +1 more | 2000-09-05 |
| 6030743 | Method for manufacturing pattern sheet for plate-making | Takashi Okumura, Koji Sugiyama, Keiji Seo | 2000-02-29 |
| 6020053 | Printing sheet for ink stamp | — | 2000-02-01 |
| 5996493 | Stamp unit protection element | Takashi Okumura, Keiji Seo, Hiroshi Takami, Minoru Yamamoto, Koji Sugiyama | 1999-12-07 |
| 5899142 | Stamp apparatus with ink dispersing device | Shinji Kobayashi | 1999-05-04 |
| 5816160 | Stamp unit capable of detachably holding stamp plate formed with stamp image | Hiroshi Taira | 1998-10-06 |
| 5035413 | Printer with an initial sheet-setting function | Keiko Yamada, Ichirou Kawashima, Nobuhiro Kitagawa | 1991-07-30 |