Issued Patents All Time
Showing 76–76 of 76 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4373294 | Door for a mine stopping having knife-edge hinges | John M. Kennedy | 1983-02-15 |
Showing 76–76 of 76 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4373294 | Door for a mine stopping having knife-edge hinges | John M. Kennedy | 1983-02-15 |