Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5685910 | Apparatus for coating an electromagnetic coil | Walter G. Stiffler, James B. Keys, David T. McKinney, Sidney Bell | 1997-11-11 |
| 5474799 | Apparatus and method for coating an electromagnetic coil | Walter G. Stiffler, James B. Keys, David T. McKinney, Sidney Bell | 1995-12-12 |
| 4453600 | Signal shank parallel ripper apparatus | — | 1984-06-12 |
| 4321970 | Ripper apparatus | — | 1982-03-30 |