Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5207833 | Line travel spray coating device | — | 1993-05-04 |
| 5181962 | Liquid spray machine for coating interior of pipes | — | 1993-01-26 |
| 4961798 | Sleeve applicator assembly for pipe joints | Ronald E. Carlson, Sr. | 1990-10-09 |
| 4595607 | Combined induction heating and coating system for pipe weld joints | John W. Betteridge, Gregory H. Carlson, Ronald E. Carlson, Sr. | 1986-06-17 |
| 4563841 | Internal grit blast weld joint cleaner | Robert Hart | 1986-01-14 |
| 4231823 | Method and apparatus for centering two concentric cylinders | John F. Bridge | 1980-11-04 |