Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4968187 | System for backfilling a subterranean void | — | 1990-11-06 |
| 4249838 | Sealed flight screw injector | Andrew C. Harvey | 1981-02-10 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4968187 | System for backfilling a subterranean void | — | 1990-11-06 |
| 4249838 | Sealed flight screw injector | Andrew C. Harvey | 1981-02-10 |