Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 8579219 | Musical cheese grater | — | 2013-11-12 | |
| 7382713 | Method and apparatus for tone arm magnetic stabilization and damping system | — | 2008-06-03 | |
| 5143598 | Methods of tar sand bitumen recovery | John J. Helstrom, Lawrence B. Peck, Richard A. Stone, Edward J. Bernier, Jr. | 1992-09-01 | $22,237,000 |
| 4722782 | Method for solvent treating of tar sands with water displacement | John J. Helstrom, Lawrence B. Peck, Richard A. Stone | 1988-02-02 | $51,137,000 |
| 4686664 | Tone arm assembly | — | 1987-08-11 | |
| 4587646 | Tone arm assembly | — | 1986-05-06 |