William J. Fies

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Portola Valley, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Ion source assembly for an ion trap mass spectrometer and method
- Patent number 5,756,996
- Issue date May 26, 1998
- Finnigan Corporation
- Mark E. Bier
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Quadrupole mass filter with unbalanced R.F. voltage
- Patent number 4,816,675
- Issue date Mar 28, 1989
- Finnigan Corporation
- William J. Fies
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Fourtier transform quadrupole mass spectrometer and method
- Patent number 4,755,670
- Issue date Jul 5, 1988
- Finnigan Corporation
- John E. P. Syka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of mass analyzing a sample over a wide mass range by use of...
- Patent number 4,650,999
- Issue date Mar 17, 1987
- Finnigan Corporation
- William J. Fies
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Mass spectrometer system and method for control of ion energy for d...
- Patent number 4,214,160
- Issue date Jul 22, 1980
- Finnigan Corporation
- William J. Fies
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Temperature stable multipole mass filter and method therefor
- Patent number 4,032,782
- Issue date Jun 28, 1977
- Finnigan Corporation
- Ronald D. Smith
- H01 - BASIC ELECTRIC ELEMENTS