Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871487 | Method of making a polymeric optical waveguide by coextrusion | Virgil W. Coomer, Walter J. Schrenk | 1989-10-03 |
| 4806289 | Method of making a hollow light pipe | Virgil W. Coomer, Walter J. Schrenk | 1989-02-21 |
| 4520547 | Flanging of plastic lined conduit | Elton D. Prueter | 1985-06-04 |