Assignee
VG INSTR GROUP
GB40 patents
Top patents by PatentIndex Score
US4810882AMar 7, 1989
Mass spectrometer for positive and negative ions
VG INSTR GROUP54 citations95
US5091645AFeb 25, 1992
Selectable-resolution charged-particle beam analyzers
VG INSTR GROUP22 citations91
US4889319ADec 26, 1989
Bakeable vacuum systems
VG INSTR GROUP35 citations90
US4866270ASep 12, 1989
Method and apparatus for the determination of isotopic composition
VG INSTR GROUP37 citations89
US4853539AAug 1, 1989
Glow discharge mass spectrometer
VG INSTR GROUP36 citations89
US4778993AOct 18, 1988
Time-of-flight mass spectrometry
VG INSTR GROUP48 citations89
US4647772AMar 3, 1987
Mass spectrometers
VG INSTR GROUP35 citations89
US5068534ANov 26, 1991
High resolution plasma mass spectrometer
VG INSTR GROUP29 citations88
US4737648AApr 12, 1988
Apparatus for detecting fibrous particle sizes by detecting scattered light at different angles
VG INSTR GROUP29 citations88
US5051584ASep 24, 1991
Plasma mass spectrometer
VG INSTR GROUP30 citations87
US4916313AApr 10, 1990
Method and apparatus for the determination of isotopic composition
VG INSTR GROUP42 citations87
US4755669AJul 5, 1988
Vacuum monitoring apparatus
VG INSTR GROUP34 citations87
US4760253AJul 26, 1988
Mass spectrometer
VG INSTR GROUP32 citations86
US4535236AAug 13, 1985
Apparatus for and method of operating quadrupole mass spectrometers in the total pressure mode
VG INSTR GROUP27 citations86
US5146088ASep 8, 1992
Method and apparatus for surface analysis
VG INSTR GROUP37 citations84
US4758723AJul 19, 1988
Electron spectrometer
VG INSTR GROUP32 citations83
US4794252ADec 27, 1988
Discharge ionization mass spectrometer
VG INSTR GROUP22 citations82
US4615591AOct 7, 1986
Mechanical positioning device for scientific instruments
VG INSTR GROUP22 citations82
US5184016AFeb 2, 1993
Glow discharge spectrometry
VG INSTR GROUP30 citations80
US4912327AMar 27, 1990
Pulsed microfocused ion beams
VG INSTR GROUP22 citations78
US4550411AOct 29, 1985
Sources used in molecular beam epitaxy
VG INSTR GROUP23 citations78
US4943718AJul 24, 1990
Mass spectrometer
VG INSTR GROUP20 citations75
US4562351ADec 31, 1985
Sample introduction device for mass spectrometers
VG INSTR GROUP21 citations75
US4723076AFeb 2, 1988
Double focusing mass spectrometers
VG INSTR GROUP11 citations73
US4727249AFeb 23, 1988
Magnetic sector mass spectrometer
VG INSTR GROUP14 citations72
US4829178AMay 9, 1989
Apparatus for surface analysis
VG INSTR GROUP14 citations70
US4912324AMar 27, 1990
Glow discharge spectrometer
VG INSTR GROUP22 citations69
US4945774AAug 7, 1990
Sample treatment apparatus
VG INSTR GROUP18 citations68
US5026454AJun 25, 1991
Vacuum evaporation and deposition
VG INSTR GROUP7 citations67
US4883957ANov 28, 1989
Mass spectrometer including cooling for the ion collection amplifiers
VG INSTR GROUP8 citations66
US4593196AJun 3, 1986
Charged particle energy spectrometer
VG INSTR GROUP11 citations66
US4487461ADec 11, 1984
Rack mounting system
VG INSTR GROUP14 citations65
US4891515AJan 2, 1990
Solution analyzing mass spectrometer
VG INSTR GROUP12 citations64
US4942296AJul 17, 1990
Super-critical fluid mass spectrometer
VG INSTR GROUP6 citations63
US5159194AOct 27, 1992
Method and apparatus for mass spectrometry
VG INSTR GROUP4 citations62
US5134287AJul 28, 1992
Double-focussing mass spectrometer
VG INSTR GROUP2 citations62
US5036195AJul 30, 1991
Gas analyzer
VG INSTR GROUP19 citations60
US5034605AJul 23, 1991
Secondary ion mass spectrometer with independently variable extraction field
VG INSTR GROUP14 citations59
US4840074AJun 20, 1989
Multi-stream fluid sampling valve
VG INSTR GROUP14 citations59
US4769542ASep 6, 1988
Charged particle energy analyzer
VG INSTR GROUP8 citations58