Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4285398 | Device for temporarily closing duct-formers in well completion apparatus | by Herbert M. Zandmer, executor | 1981-08-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4285398 | Device for temporarily closing duct-formers in well completion apparatus | by Herbert M. Zandmer, executor | 1981-08-25 |