| 5146174 |
Switching arrangement method and apparatus for making parameter measurement and adjustment of coupled dual resonator crystals using both resonator ports |
Gerald E. Roberts, Myron A. Turner, Jr. |
1992-09-08 |
| 5049828 |
Method and apparatus for parameter measurement of coupled-dual resonator crystals |
Gerald E. Roberts |
1991-09-17 |
| 4839618 |
Monolithic crystal filter with wide bandwidth and method of making same |
Gerald E. Roberts, A. Gordon Staples |
1989-06-13 |
| 4833430 |
Coupled-dual resonator crystal |
Gerald E. Roberts, Robert J. Crescenzi |
1989-05-23 |
| 4676993 |
Method and apparatus for selectively fine-tuning a coupled-dual resonator crystal and crystal manufactured thereby |
Gerald E. Roberts, Robert J. Crescenzi |
1987-06-30 |
| 4627379 |
Shutter apparatus for fine-tuning a coupled-dual resonator crystal |
Gerald E. Roberts |
1986-12-09 |
| 4449104 |
Circuit for controlling the output level of an electronic device |
William C. Agnor, Edwin C. Lafferty |
1984-05-15 |
