Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5187743 | Telephone base with a display unit | Gerd Kuhfus, James Schmidt | 1993-02-16 |
| 5172805 | Pushbutton and carrying member combination for operating an electronic switching device | — | 1992-12-22 |
| 5121427 | Telephone base members and support members | Edward J. R. Foster | 1992-06-09 |
| 5086466 | Telephone base structures for stabilizing upon support surfaces | Edward J. R. Foster | 1992-02-04 |
| 4776009 | Telephone handset having housings assembled without mechanical fasteners | Richard James Elgie, John S. Mecher | 1988-10-04 |
| 4773091 | Telephone handset for use in noisy locations | Alan C. Busche | 1988-09-20 |
| 4731833 | Low profile circuit board mounted telephone jack | Eric Foster, Laurence J. Retallack | 1988-03-15 |
| 4638116 | Masking of holes in circuit patterns on circuit boards prior to flow soldering | — | 1987-01-20 |
| 4594478 | Transmitter assembly for a telephone handset | Raymond C. Freeman, Alan C. Busche | 1986-06-10 |
| 4529846 | Dynamic telephone receiver with magnetic shunt | Raymond C. Freeman, Alan C. Busche | 1985-07-16 |
| 4424419 | Electret microphone shield | Guy J. Chaput, Edward Sich | 1984-01-03 |
| 4385209 | Adjustment of operating characteristics of a telephone transmitter including an electret transducer | William D. Greason, Alan C. Busche, Eric Foster | 1983-05-24 |
| 4188513 | Electret microphone with simplified electrical connections by printed circuit board mounting | Ronald J. Morrell, Algirdas J. Dragunevicius | 1980-02-12 |