William A. Frezza

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Warminster, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Bootstrap channel security arrangement for communication network
- Patent number 4,982,430
- Issue date Jan 1, 1991
- General Instrument Corporation
- William A. Frezza
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Security arrangement for downloadable cable television converters
- Patent number 4,712,239
- Issue date Dec 8, 1987
- General Instrument Corporation
- William Frezza
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus and method for restricting access to a communication network
- Patent number 4,638,356
- Issue date Jan 20, 1987
- General Instrument Corporation
- William A. Frezza
- H04 - ELECTRIC COMMUNICATION TECHNIQUE