Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4735327 | Radio controlled downhill skyline logging carriage and system | David Johnson | 1988-04-05 |
| 4679803 | Apparatus for maintaining stability of mobile land vehicles on sloping terrain | David Johnson | 1987-07-14 |
| 4637643 | Auto-release logging choker | David Johnson | 1987-01-20 |
| 4629079 | Transport carriage | Penn A. Peters, David Johnson | 1986-12-16 |
| 4615532 | Locking balls for logging carriage | David Johnson | 1986-10-07 |
| 4500004 | Transport carriage | Penn A. Peters, David Johnson | 1985-02-19 |
| 4440305 | Carriage for cable logging system | David Johnson | 1984-04-03 |
| 4387812 | Intermediate cable support | David Johnson | 1983-06-14 |
| 4373853 | Log handling machine | Benjamin C. Thorner | 1983-02-15 |
| 4355727 | Intermediate support for a skyline logging system | — | 1982-10-26 |