incorporating subsidiary guide means for heads, other than modulated grooves Part-formed unmodulated grooves for conversion into transducing grooves

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CPC
G11B3/80

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GPHYSICS G11Information storage G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER G11B3/00Recording by mechanical cutting, deforming or pressing

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G11B3/80incorporating subsidiary guide means for heads, other than modulated grooves Part-formed unmodulated grooves for conversion into transducing grooves

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Patents Grantslast 30 patents

Information Patent Grant
Stylus shift mechanism for a phonograph having two concentric records
- Patent number 4,076,256
- Issue date Feb 28, 1978
- Ozen Co., Ltd.
- Katsumi Watanabe
- G11 - INFORMATION STORAGE
Information Patent Grant
2654810
- Patent number 2,654,810
- Issue date Oct 6, 1953
- G11 - INFORMATION STORAGE