Gunter John

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Indianapolis, IN, US

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Patents Grantslast 30 patents

Information Patent Grant
Disc record with tapered groove
- Patent number 4,525,751
- Issue date Jun 25, 1985
- RCA Corporation
- Edward J. Freeman
- G11 - INFORMATION STORAGE
Information Patent Grant
Cutting stylus for mechanically cutting masters for keel-lapping
- Patent number 4,429,678
- Issue date Feb 7, 1984
- RCA Corporation
- Gunter John
- B24 - GRINDING POLISHING
Information Patent Grant
Variable pitch grooved label for video disc
- Patent number 4,341,952
- Issue date Jul 27, 1982
- RCA Corporation
- Gunter John
- G06 - COMPUTING CALCULATING COUNTING