John D. Fourdraine

Follow

Person

Toronto, CA

People

Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for determining when a telephone handset is of...
- Patent number 4,958,371
- Issue date Sep 18, 1990
- Control Data Corporation
- Joseph A. Damoci
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus and method for automatically monitoring broadcast band li...
- Patent number 4,955,070
- Issue date Sep 4, 1990
- Viewfacts, Inc.
- Russell J. Welsh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Modem ringing supression circuit
- Patent number 4,845,741
- Issue date Jul 4, 1989
- Control Data Corporation
- John D. Fourdraine
- H04 - ELECTRIC COMMUNICATION TECHNIQUE