Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5658972 | Fire retardant plastic construction material | Kenneth F. Grzybowski, David Reese Jones, IV, Timothy J. Roth | 1997-08-19 |
| 5639298 | Modified gypsum compositions | F. MacGregor Miller, Timothy J. Roth, John Robert Brown | 1997-06-17 |