Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12077697 | Diverting agent and method of filling fracture in well using the same | Norihito SAKAI, Tomoya Fujita, Takahiro Saka, Chizuko Furo | 2024-09-03 |
| 11597870 | Diverting agent and method of filling fracture in well using the same | Norihito SAKAI, Tomoya Fujita, Takahiro Saka, Chizuko Furo | 2023-03-07 |
| 8569414 | Polyvinyl alcohol resin composition and molded article thereof | Mitsuo Shibutani, Kaoru Inoue, Norihito SAKAI | 2013-10-29 |