Townsend H. Porter Jr.

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Rochester, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Rotatable storage apparatus with digitally responsive circuitry for...
- Patent number 4,157,577
- Issue date Jun 5, 1979
- International Business Machines Corporation
- Townsend H. Porter
- G11 - INFORMATION STORAGE
Information Patent Grant
Cartridge and flexible magnetic disk assembly
- Patent number 4,149,207
- Issue date Apr 10, 1979
- International Business Machines Corporation
- Townsend H. Porter
- G11 - INFORMATION STORAGE
Information Patent Grant
Tape cartridge drive
- Patent number 3,949,951
- Issue date Apr 13, 1976
- International Business Machines Corporation
- Townsend Henry Porter
- G11 - INFORMATION STORAGE