Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE32921 | Method of powder coating the inside of pipes with a continuous film of plastic material | — | 1989-05-09 |
| 4816296 | Tangential jet air pipe coating apparatus and method | — | 1989-03-28 |
| 4816297 | Method of powder coating the inside of pipes with a continuous film of plastic material | — | 1989-03-28 |