Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5395442 | Lightweight concrete roof tiles | Francis Petersen | 1995-03-07 |
| 4904089 | Particle wetting process and apparatus | Donald H. Rez | 1990-02-27 |
| 4872913 | Apparatus and method to produce foam, and foamed concrete | Donald H. Rez | 1989-10-10 |
| 4830505 | Particle wetting process and apparatus | Donald H. Rez | 1989-05-16 |
| 4789244 | Apparatus and method to produce foam, and foamed concrete | Donald H. Rez | 1988-12-06 |
| 4231801 | Cement and concrete mixture | — | 1980-11-04 |