Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5753402 | Method for recording and processing motion picture film soundtrack | Frank A. Pettrone, Richard C. Sehlin | 1998-05-19 |
| 5184175 | System and method for reproducing an image | Charles P. Hagmaier, Mitchell J. Bogdanowicz, Christopher L. DuMont, Richard C. Sehlin | 1993-02-02 |
| 5122769 | System and method for reproducing an image | Charles P. Hagmaier, Mitchell J. Bogdanowicz, Christopher L. DuMont, Richard C. Sehlin | 1992-06-16 |