Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4917187 | Method and apparatus for hydraulically firing a perforating gun below a set packer | Elmer R. Peterson | 1990-04-17 |
| D303825 | Golf putter head | — | 1989-10-03 |
| 4722400 | Mechanically actuated subsurface injection tool | — | 1988-02-02 |
| 4603304 | Reference frequency generation for split-comb frequency synthesizer | Thomas L. Grisell, Fred H. Ives | 1986-07-29 |