John J. Simbal

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Woodbury, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Stepless micrographic zoom lens having large magnification ratio
- Patent number 5,481,405
- Issue date Jan 2, 1996
- Minnesota Mining and Manufacturing Company
- John J. Simbal
- G02 - OPTICS
Information Patent Grant
Color-corrected telecentric scan lens
- Patent number 5,087,987
- Issue date Feb 11, 1992
- Minnesota Mining and Manufacturing Company
- John J. Simbal
- G02 - OPTICS
Information Patent Grant
Image mask for microfiche
- Patent number 4,688,911
- Issue date Aug 25, 1987
- Minnesota Mining and Manufacturing Company
- John J. Simbal
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Ultra-wide angle micrographic lens
- Patent number 4,682,863
- Issue date Jul 28, 1987
- Minnesota Mining and Manufacturing Company
- John J. Simbal
- G02 - OPTICS