Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11345005 | Split nut valve seat puller | William Stephen Colburn, Robert H. Ash, Jr. | 2022-05-31 |
| 11225963 | Quick pull valve and seat assembly | Mark Henry Naedler, William Stephen Colburn | 2022-01-18 |
| 10815989 | Quick pull valve and seat assembly | Mark Henry Naedler, William Stephen Colburn | 2020-10-27 |