Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D521458 | Access control cover | J. Clayton Mehnert | 2006-05-23 |
| 6934300 | Initialization method for an entertainment and communications network | Stephen R. Tomassetti, Donald C. Snedigar | 2005-08-23 |
| 6907458 | Digital multi-room, multi-source entertainment and communications network | Stephen R. Tomassetti, Donald C. Snedigar, Bradford L. Farris | 2005-06-14 |
| 5175532 | Optical drill collar position verifier | John B. Portzer | 1992-12-29 |
| 5122347 | Vertical ultraviolet exposure unit | Gary E. Hayden, Jeffrey F. Kotz, Juzer Mohammed | 1992-06-16 |
| 5040309 | Drill collar position verifier | Gary E. Hayden, John B. Portzer | 1991-08-20 |