Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4944905 | Particulate ceramic useful as a proppant | James A. Laird, George Lee, William C. Whitcomb | 1990-07-31 |
| 4923714 | Novolac coated ceramic particulate | James A. Laird, Leslie G. Berntson | 1990-05-08 |
| 4869960 | Epoxy novolac coated ceramic particulate | James A. Laird, Leslie G. Berntson | 1989-09-26 |
| 4680230 | Particulate ceramic useful as a proppant | James A. Laird, George Lee, William C. Whitcomb | 1987-07-14 |