Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4925390 | Apparatus for retaining the configuration of an aperture formed through a coil | Michael A. Ringle | 1990-05-15 |
| 4793801 | Method for retaining the configuration of an aperture formed through a coil | Michael A. Ringle | 1988-12-27 |