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David M. Heffelfinger
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San Pablo, CA, US
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last 30 patents
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Patent Grant
Multi parameter scanner
Patent number
6,043,506
Issue date
Mar 28, 2000
Bio-Rad Laboratories, Inc.
David M. Heffelfinger
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Method and apparatus for correcting illumination non-uniformities
Patent number
5,951,838
Issue date
Sep 14, 1999
Bio-Rad Laboratories, Inc.
David M. Heffelfinger
G01 - MEASURING TESTING
Information
Patent Grant
Method and apparatus for the removal of non-uniformities in an elec...
Patent number
5,897,760
Issue date
Apr 27, 1999
Bio-Rad Laboratories, Inc.
David M. Heffelfinger
G01 - MEASURING TESTING
Information
Patent Grant
Method and apparatus for correcting lens non-uniformities in an ele...
Patent number
5,891,314
Issue date
Apr 6, 1999
Bio-Rad Laboratories, Inc.
David M. Heffelfinger
G01 - MEASURING TESTING
Information
Patent Grant
Fluorescence imaging instrument utilizing fish
Patent number
5,885,531
Issue date
Mar 23, 1999
Bio-Rad Laboratories, Inc.
David M. Heffelfinger
G01 - MEASURING TESTING
Information
Patent Grant
Fluorescence imaging instrument utilizing fish
Patent number
5,863,504
Issue date
Jan 26, 1999
Bio-Rad Laboratories, Inc.
David M. Heffelfinger
G01 - MEASURING TESTING
Information
Patent Grant
Method and apparatus for correcting lens and detector non-uniformities
Patent number
5,799,773
Issue date
Sep 1, 1998
Bio-Rad Laboratories, Inc.
David M. Heffelfinger
G01 - MEASURING TESTING
Information
Patent Grant
Method for conducting multiparametric fluorescence in situ hybridiz...
Patent number
5,792,610
Issue date
Aug 11, 1998
BioRad Laboratories, Inc.
Franklin R. Witney
C12 - BIOCHEMISTRY BEER SPIRITS WINE VINEGAR MICROBIOLOGY ENZYMOLOGY MUTATION...
Information
Patent Grant
Tunable excitation and/or tunable detection microplate reader
Patent number
5,784,152
Issue date
Jul 21, 1998
Bio-Rad Laboratories
David M. Heffelfinger
G01 - MEASURING TESTING
Information
Patent Grant
Tunable excitation and/or tunable emission fluorescence imaging
Patent number
5,591,981
Issue date
Jan 7, 1997
Bio-Rad Laboratories, Inc.
David M. Heffelfinger
G01 - MEASURING TESTING
Information
Patent Grant
Fiber optic storage phosphor imaging plate scanner
Patent number
5,266,803
Issue date
Nov 30, 1993
Bio-Rad Labratories, Inc.
David M. Heffelfinger
G02 - OPTICS