Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10087337 | Oil-based ball-point pen refill, oil-based ball-point pen, and oil-based ball-point pen ink composition | Akihiro Shiobara, Kouichi Takayama, Yasuyuki Sugimoto, Susumu Yamaguchi, Toshihide KAWASAKI | 2018-10-02 |
| 9375972 | Writing instrument | Naoto MASUSHIGE | 2016-06-28 |
| 8430591 | Ballpoint pen tip and ballpoint pen | Keishi Okamoto, Satoru Ando, Tatsuyuki Nakatani, Yuki Nitta, Kunihiro Toyota +2 more | 2013-04-30 |
| 5294439 | Stabilized benzimidazole derivative and composition | Heinojo Yamasaka, Hiroyasu Uchiyama, Yoshiomi Sakamoto, Yoshimi Nakamigawa, Mitsuko Yoshioka +1 more | 1994-03-15 |