Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5184391 | Process of press fitting pipe sections together to form a pipeline | Allan T. Fisk | 1993-02-09 |
| 5079816 | Positive seal coupling internal joining press | Allan T. Fisk | 1992-01-14 |
| 5078546 | Pipe bursting and replacement method | Allan T. Fisk, Thomas Mann | 1992-01-07 |
| 4983071 | Pipe bursting and replacement apparatus and method | Allan T. Fisk, Thomas Mann | 1991-01-08 |
| 4892457 | Apparatus for mastering a robot | Donald S. Bartlett, William H. Poynter, Jr. | 1990-01-09 |
| 4753128 | Robot with spring pivot balancing mechanism | Donald S. Bartlett, William H. Poynter, Jr. | 1988-06-28 |