Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9580156 | Floating dock | Daniel Wittenberg, Lockhart Gordon McCallum | 2017-02-28 |
| 8132986 | Water ballasted wave attenuator | Daniel Wittenberg, Lockhart Gordon McCallum | 2012-03-13 |
| 5383282 | Saddle-joint jig | Derek V. Doerr | 1995-01-24 |
| 4600942 | Secure coding and decoding system and method for television program signals | Clarence D. Perr, Ronald R. Gerlach | 1986-07-15 |
| 4410911 | Multiple signal transmission method and system, particularly for television | Ronald R. Gerlach, Clarence D. Perr, Robert S. Block | 1983-10-18 |
| 4398216 | Multiple signal transmission method and system, particularly for television | Ronald R. Gerlach, Clarence D. Perr, Robert S. Block | 1983-08-09 |