John D. Hakanson

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South St. Paul, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Static reduction in magnetic record disk assemblies
- Patent number 4,722,017
- Issue date Jan 26, 1988
- Minnesota Mining and Manufacturing Company
- Wayne H. Vannet
- G11 - INFORMATION STORAGE
Information Patent Grant
Static reduction in magnetic recording cassettes
- Patent number 4,570,197
- Issue date Feb 11, 1986
- Minnesota Mining and Manufacturing Company
- John D. Hakanson
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Magnetic head cleaning tape and method
- Patent number 3,978,520
- Issue date Aug 31, 1976
- Minnesota Mining and Manufacturing Company
- John V. Nowicki
- G11 - INFORMATION STORAGE