Philip H. Rittmueller

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St. Charles, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Digital data cryptographic system
- Patent number 5,406,627
- Issue date Apr 11, 1995
- NEC Home Electronics, Ltd.
- John R. Thompson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Audio signal cryptographic system
- Patent number 5,267,312
- Issue date Nov 30, 1993
- NEC Home Electronics, Ltd.
- John R. Thompson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System and method for scrambling and/or descrambling a video signal
- Patent number 5,185,794
- Issue date Feb 9, 1993
- NEC Home Electronics, Ltd.
- John R. Thompson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System and method for detection of a pulse within a video signal
- Patent number 5,166,976
- Issue date Nov 24, 1992
- NEC Home Electronics, Ltd.
- John R. Thompson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System and method for transmitting entertainment information to aut...
- Patent number 5,091,938
- Issue date Feb 25, 1992
- NEC Home Electronics, Ltd.
- John R. Thompson
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Acoustic alarm detection system for telephone activation
- Patent number 4,897,862
- Issue date Jan 30, 1990
- NEC Corporation
- Kaneyuki Nishihara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE