Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885792 | Audio mixer architecture using virtual gain control and switching | Donald R. Christensen, Robert Bateman | 1989-12-05 |
| 4858011 | Video switcher system with modular architecture | Richard A. Jackson, Peter D. Symes, Richard S. Bannister, Richard A. Frasier, John Abt +4 more | 1989-08-15 |
| 4853784 | Video switcher with independent processing of selected video signals | John Abt, Ronnie D. Barnett, James E. Blecksmith, Kevin D. Windrem, Neil R. Olmstead +4 more | 1989-08-01 |