Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4257448 | Flow cut-off device for insertion in a gas duct | Leung W. Kwong | 1981-03-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4257448 | Flow cut-off device for insertion in a gas duct | Leung W. Kwong | 1981-03-24 |