Gerald F. Fetterer

Follow

Person

Mount Prospect, IL, US

People

Patents Grantslast 30 patents

Information Patent Grant
Multiport conference circuit
- Patent number 4,175,215
- Issue date Nov 20, 1979
- GTE Automatic Electric Laboratories Incorporated
- Donald W. McLaughlin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
3-Port conference circuit for use in private automatic branch exchange
- Patent number 4,126,766
- Issue date Nov 21, 1978
- GTE Automatic Electric Laboratories Incorporated
- Donald W. McLaughlin
- H04 - ELECTRIC COMMUNICATION TECHNIQUE