Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4355112 | Streptomyces culture | Yasushi Okumura, Yasuo Fugakawa, Tomoyuki Ishikura, Kageaki Kouno, Joseph Lein | 1982-10-19 |
| 4318916 | Antibiotic PS-5 and derivatives having .beta.-lactamase inhibitory activity and production thereof | Shoji Hirata, Yasushi Okumura, Yasuo Fukagawa, Yasutaka Shimauchi, Tomoyuki Ishikura +2 more | 1982-03-09 |