Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5086836 | Retarding heat tracing system and method of making same | Roy E. Barth, Atlee E. Fritz, Arthur J. McDonald | 1992-02-11 |
| 4288253 | Water insensitive bonded perlite structural materials | — | 1981-09-08 |