Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4555854 | Roll tape measure | — | 1985-12-03 |
| 4403006 | Sag-resistant gypsum board containing coal fly ash and method for making same | Robert Bruce | 1983-09-06 |
| 4259146 | Method of heat treating chrysotile asbestos fibres | Roger W. Glass | 1981-03-31 |
| 4192707 | Heat treatment of chrysotile asbestos fibres | Roger W. Glass | 1980-03-11 |