Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4993203 | Fireproof frame structure in a building opening portion | Kiyoshi Tanaka | 1991-02-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4993203 | Fireproof frame structure in a building opening portion | Kiyoshi Tanaka | 1991-02-19 |