Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5782621 | Manual pump with inherent vacuum limit | — | 1998-07-21 |
| 5009548 | Apparatus for and a method of facilitating the excavating and refilling of a trench | G. P. "Sonny" Falbo | 1991-04-23 |
| 4762242 | Retractable cover for an opening having limited stacking space | James K. Kuhns | 1988-08-09 |
| 4755004 | Rotary rocksaw device | Roger A. Palmquist | 1988-07-05 |
| 4626032 | Rock ditcher | Louis L. Lutich | 1986-12-02 |
| 4333537 | Impact drilling tool having improved valving | Louis L. Lutich | 1982-06-08 |
| 4290578 | Failsafe cutoff valve for oil and gas wells | Sherald B. Earp, Louis L. Lutich | 1981-09-22 |