John F. Kulkens

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Park Ridge, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Cathode ray tube socket with controlled spark gaps
- Patent number 4,298,815
- Issue date Nov 3, 1981
- Zenith Radio Corporation
- Theodore M. Ishihara
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Synchronizing circuit having a variable bandpass filter
- Patent number 3,931,467
- Issue date Jan 6, 1976
- Warwick Electronics Inc.
- John F. Kulkens
- H04 - ELECTRIC COMMUNICATION TECHNIQUE