Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8500354 | Water-based ballpoint pen | — | 2013-08-06 |
| 8491213 | Water-based ballpoint pen | — | 2013-07-23 |
| 7396797 | Production method of catalyst for fuel cell and of fuel cell, and catalyst for fuel cell and fuel cell | Masami Tsutsumi, Seiji Hibino, Hiroaki Yoshida, Fumio Takei, Kensuke Yoshida | 2008-07-08 |
| 6887921 | Ink follower composition for writing instruments, and process for its production | Hideaki Asami | 2005-05-03 |