Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4349902 | Piezoelectric transducer for recording video information | John Valachovic, John H. Reisner, Karl-Friedrich Etzold | 1982-09-14 |
| 4330882 | Apparatus for monitoring a wideband electromechanical recording system | Wilber C. Stewart | 1982-05-18 |