Vurnen J. Leonard

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Minneapolis, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Magnetic recording disk cartridge
- Patent number D307893
- Issue date May 15, 1990
- Minnesota Mining and Manufacturing Company
- Arthur K. Kato
- D14 - Recording, communication, or information retrieval equipment
Information Patent Grant
Disk cartridge
- Patent number 4,885,652
- Issue date Dec 5, 1989
- Minnesota Mining and Manufacturing Company
- Vurnen J. Leonard
- G11 - INFORMATION STORAGE
Information Patent Grant
Disk restraint
- Patent number 4,879,621
- Issue date Nov 7, 1989
- Minnesota Mining and Manufacturing Company
- Davis W. Chamberlin
- G11 - INFORMATION STORAGE
Information Patent Grant
Disc cartridge
- Patent number 4,875,128
- Issue date Oct 17, 1989
- Minnesota Mining and Manufacturing Company
- Vurnen Leonard
- G11 - INFORMATION STORAGE
Information Patent Grant
Recording disk centering hub
- Patent number 4,843,512
- Issue date Jun 27, 1989
- Minnesota Mining and Manufacturing Company
- Larry D. Moore
- G11 - INFORMATION STORAGE
Information Patent Grant
Stretched surface recording disk substrate
- Patent number 4,631,609
- Issue date Dec 23, 1986
- Minnesota Mining and Manufacturing Company
- Leif O. Erickson
- G11 - INFORMATION STORAGE