David Q. Lee

Person

Boca Raton, FL, US

People

Patents Grantslast 30 patents

Information Patent Grant
Dial pulse sensor and repeater circuit
- Patent number 4,230,912
- Issue date Oct 28, 1980
- GTE Automatic Electric Laboratories Incorporated
- David Q. Lee
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Call for service and continuity sensor circuit
- Patent number 4,190,745
- Issue date Feb 26, 1980
- GTE Automatic Electric Laboratories Incorporated
- Julius Jusinskas
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
AC supervisory signal detector circuit
- Patent number 4,133,982
- Issue date Jan 9, 1979
- GTE Automatic Electric Laboratories Incorporated
- David Q. Lee
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Detector circuit for sensing battery polarity and loop closure
- Patent number 4,126,765
- Issue date Nov 21, 1978
- GTE Automatic Electric Laboratories Incorporated
- John A. Calder
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Line conditioning and transfer circuit
- Patent number 4,071,709
- Issue date Jan 31, 1978
- GTE Automatic Electric Laboratories Incorporated
- David Quon Lee
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Conference circuit for pulse coded modulated telephony
- Patent number 4,054,755
- Issue date Oct 18, 1977
- GTE Automatic Electric Laboratories Incorporated
- David Quon Lee
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Conference circuit for pulse coded modulated telephony
- Patent number 4,022,981
- Issue date May 10, 1977
- GTE Automatic Electric Laboratories Incorporated
- Donald W. McLaughlin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Memory operation for 3-way communications
- Patent number 3,967,070
- Issue date Jun 29, 1976
- GTE Automatic Electric Laboratories Incorporated
- Dinesh K. Srivastava
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Tone injection circuit
- Patent number 3,931,474
- Issue date Jan 6, 1976
- GTE Automatic Electric Laboratories Incorporated
- Donald W. McLaughlin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

David Q. Lee

Person

Patents Grantslast 30 patents

Dial pulse sensor and repeater circuit

Call for service and continuity sensor circuit

AC supervisory signal detector circuit

Detector circuit for sensing battery polarity and loop closure

Line conditioning and transfer circuit

Conference circuit for pulse coded modulated telephony

Conference circuit for pulse coded modulated telephony

Memory operation for 3-way communications

Tone injection circuit