Inventor · disambiguated record
Donald D. Huizinga
Also filed as: HUIZINGA DONALD D · HUIZINGA DONALD DEAN
5 granted patents·124 citations·filing 1976–1988
82Inventor score
Technology areasH04M
Top patents by PatentIndex Score
5 records- 0192US4046972AKey telephone station set circuitBELL TELEPHONE LABOR INC·Filed 1976·Granted Sep 6, 1977·57 cites·16 claims
- 0268US4488006AApparatus for controlling the application of telephone line power in a telephone setAT & T BELL LAB·Filed 1982·Granted Dec 11, 1984·22 cites·7 claims
- 0366US4416007ADigital conferencing method and arrangementBELL TELEPHONE LABOR INC·Filed 1981·Granted Nov 15, 1983·19 cites·20 claims
- 0459US4870679ARepertory telephone dialer with remote billing capabilityAMERICAN TELEPHONE & TELEGRAPH·Filed 1988·Granted Sep 26, 1989·22 cites·17 claims
- 0536US4413159ADial pulsing circuitBELL TELEPHONE LABOR INC·Filed 1982·Granted Nov 1, 1983·4 cites·13 claims
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