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Patent applications and USPTO patent grants for Warman; Bloomfield J..The latest application filed is for "telephone conference amplifiers, and telephone conference bridges incorporating the same".
Patent | Date |
---|---|
Telephone conference amplifiers, and telephone conference bridges incorporating the same Grant 4,467,143 - Warman August 21, 1 | 1984-08-21 |
Compensation of transmission losses in a telephone system Grant 4,320,257 - Warman March 16, 1 | 1982-03-16 |
Device for establishing conference calls via at least one telephone exchange switching system Grant 4,232,198 - Warman November 4, 1 | 1980-11-04 |
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