Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5255717 | System for removing a plug from a heat exchanger tube | Lawrence A. Nelson, George G. Elder, Robert F. Keating | 1993-10-26 |
| 4903392 | Method for removing a metallic plug from a tube by simultaneously heating and stretching the plug | Mark M. Stickel, James W. Everett, Ray A. Shirey, Roy D. Hosley, Eugene P. Ciferno | 1990-02-27 |
| 4829660 | System for removing a plug from a heat exchanger tube | James W. Everett, John B. Gunter, William Woolfolk, Frank Sadofsky, Lawrence A. Nelson +2 more | 1989-05-16 |