Karras; Ernest C.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Karras; Ernest C..The latest application filed is for "telephone day count traffic observing and data accumulating equipment".
- Karras; Ernest C. - Oak Brook IL
- Karras; Ernest C. - Chicago IL
| Patent | Date |
|---|---|
| Telephone day count traffic observing and data accumulating equipment Grant 4,250,354 - Karras February 10, 1 | 1981-02-10 |
| Traffic usage recorder Grant 4,085,293 - Karras April 18, 1 | 1978-04-18 |
| Telephone service observation system Grant 3,917,915 - Karras November 4, 1 | 1975-11-04 |
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