Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6050344 | Rotary garden tool | David A. Larson | 2000-04-18 |
| 5474364 | Shotgun cartridge rock breaker | Peter L. Ruzzi | 1995-12-12 |
| 5335977 | Double acting bit holder | David A. Larson, Peter L. Ruzzi | 1994-08-09 |
| 5123710 | Impact assisted segmented cutterhead | David A. Larson, Peter L. Ruzzi | 1992-06-23 |
| 5078219 | Concave drag bit cutter device and method | David A. Larson | 1992-01-07 |
| 5013093 | Universal ripper miner | David A. Larson | 1991-05-07 |
| 5003144 | Microwave assisted hard rock cutting | David P. Lindroth, James Robert Blair | 1991-03-26 |
| 4501448 | Universal ripper miner | David A. Larson | 1985-02-26 |
| 4249777 | Method of in situ mining | William C. Larson, Robert D. Schmidt | 1981-02-10 |
| 4222611 | In-situ leach mining method using branched single well for input and output | William C. Larson | 1980-09-16 |