Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8277349 | Actuation system | Timothy A. Erhart, William Zerull, James H. Sandlin | 2012-10-02 |
| 5379513 | Automated nailing device | Jack W. Gresham | 1995-01-10 |
| 5335499 | Multiple hydraulic actuators with series/parallel operation | Jack W. Gresham | 1994-08-09 |
| 5312022 | Compensating nail-driving chuck for pallet-making machine | Jack W. Gresham | 1994-05-17 |
| 4834198 | Positive latch wire line core barrel apparatus | — | 1989-05-30 |
| 4800969 | Fast descent core barrel apparatus | — | 1989-01-31 |