Frank A. Hull

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St. Paul, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Proof light
- Patent number 4,989,032
- Issue date Jan 29, 1991
- Chesley F. Carlson Company
- Frank A. Hull
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Apparatus for automatically determining the densities of a graphic...
- Patent number 4,941,746
- Issue date Jul 17, 1990
- Chesley F. Carlson Company
- Frank A. Hull
- G01 - MEASURING TESTING
Information Patent Grant
Dark signal compensation for diode arrays
- Patent number 4,933,543
- Issue date Jun 12, 1990
- Carlson; Chesley F.
- Frank A. Hull
- G01 - MEASURING TESTING
Information Patent Grant
Automated self calibrating exposure computer
- Patent number 4,498,140
- Issue date Feb 5, 1985
- Carlson; Chesley F.
- Frank A. Hull
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY