Ricky J. Madsen

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Crystal, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Depth-of-field indicator for a camera
- Patent number 6,081,670
- Issue date Jun 27, 2000
- Lifetouch National School Studies Inc.
- Ricky J. Madsen
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Transducer arm assembly for floppy disk
- Patent number 4,343,025
- Issue date Aug 3, 1982
- Nortronics Company, Inc.
- Leonard E. Kronfeld
- G11 - INFORMATION STORAGE
Information Patent Grant
Transducer supporting assembly for double sided floppy disk
- Patent number 4,309,732
- Issue date Jan 5, 1982
- Nortronics Company, Inc.
- Leonard E. Kronfeld
- G11 - INFORMATION STORAGE