Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4540946 | Variable characteristic filters | Victor C. Roberts | 1985-09-10 |
| 4434669 | Apparatus for transmitting and receiving sound | Victor C. Roberts | 1984-03-06 |
| 4391148 | Methods and apparatus for measuring the cross-sectional area of a duct and the volume flow rate of fluid in the duct | Victor C. Roberts | 1983-07-05 |