Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4704238 | Process for the production of air-permeable films | Katsumi Okuyama | 1987-11-03 |
| 4585604 | Process for preparing an air-permeable film | Katsumi Okuyama | 1986-04-29 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4704238 | Process for the production of air-permeable films | Katsumi Okuyama | 1987-11-03 |
| 4585604 | Process for preparing an air-permeable film | Katsumi Okuyama | 1986-04-29 |