Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831703 | Apparatus and method for plugging a tube | Kenneth D. Kolberg, William G. Cole, Gregory L. Calhoun | 1989-05-23 |
| 4815845 | Axial alignment aid for remote control operations and related method | Michael Edward Colbaugh | 1989-03-28 |