Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4573028 | Mechanical filter apparatus having interchanged resonator means for improved coupling of bridging wires | — | 1986-02-25 |
| 4553060 | Electromechanical resonator apparatus | William J. Domino, Robert A. Johnson | 1985-11-12 |
| 4405909 | Mechanical filter with box-type coupling structure | Robert A. Johnson | 1983-09-20 |