Roger S. Johnson

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Del Mar, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Transport for tape cartridge with leader block
- Patent number 4,809,099
- Issue date Feb 28, 1989
- Cipher Data Products, Inc.
- John F. Murphy
- G11 - INFORMATION STORAGE
Information Patent Grant
Transport for tape cartridge with leader block
- Patent number 4,704,645
- Issue date Nov 3, 1987
- Cipher Data Products, Inc.
- John F. Murphy
- G11 - INFORMATION STORAGE