Assignee
VG INSTR GROUP
GB·40 granted patents·917 citations·filing 1983–1991
Top patents by PatentIndex Score
40 records- 0193US4810882AMass spectrometer for positive and negative ionsVG INSTR GROUP·Filed 1988·Granted Mar 7, 1989·54 cites·15 claims
- 0288US4778993ATime-of-flight mass spectrometryVG INSTR GROUP·Filed 1987·Granted Oct 18, 1988·48 cites·22 claims
- 0383US4916313AMethod and apparatus for the determination of isotopic compositionVG INSTR GROUP·Filed 1988·Granted Apr 10, 1990·42 cites·24 claims
- 0483US4853539AGlow discharge mass spectrometerVG INSTR GROUP·Filed 1987·Granted Aug 1, 1989·36 cites·13 claims
- 0583US4535236AApparatus for and method of operating quadrupole mass spectrometers in the total pressure modeVG INSTR GROUP·Filed 1984·Granted Aug 13, 1985·27 cites·17 claims
- 0680US4758723AElectron spectrometerVG INSTR GROUP·Filed 1987·Granted Jul 19, 1988·32 cites·14 claims
- 0779US5068534AHigh resolution plasma mass spectrometerVG INSTR GROUP·Filed 1989·Granted Nov 26, 1991·29 cites·17 claims
- 0878US4794252ADischarge ionization mass spectrometerVG INSTR GROUP·Filed 1987·Granted Dec 27, 1988·22 cites·16 claims
- 0977US4760253AMass spectrometerVG INSTR GROUP·Filed 1987·Granted Jul 26, 1988·32 cites·6 claims
- 1077US4550411ASources used in molecular beam epitaxyVG INSTR GROUP·Filed 1983·Granted Oct 29, 1985·23 cites·12 claims
- 1176US5146088AMethod and apparatus for surface analysisVG INSTR GROUP·Filed 1990·Granted Sep 8, 1992·37 cites·10 claims
- 1276US4912327APulsed microfocused ion beamsVG INSTR GROUP·Filed 1989·Granted Mar 27, 1990·22 cites·16 claims
- 1375US4943718AMass spectrometerVG INSTR GROUP·Filed 1989·Granted Jul 24, 1990·20 cites·20 claims
- 1473US4755669AVacuum monitoring apparatusVG INSTR GROUP·Filed 1987·Granted Jul 5, 1988·34 cites·20 claims
- 1573US4562351ASample introduction device for mass spectrometersVG INSTR GROUP·Filed 1983·Granted Dec 31, 1985·21 cites·8 claims
- 1672US5051584APlasma mass spectrometerVG INSTR GROUP·Filed 1990·Granted Sep 24, 1991·30 cites·19 claims
- 1772US4866270AMethod and apparatus for the determination of isotopic compositionVG INSTR GROUP·Filed 1988·Granted Sep 12, 1989·37 cites·22 claims
- 1871US4647772AMass spectrometersVG INSTR GROUP·Filed 1985·Granted Mar 3, 1987·35 cites·7 claims
- 1970US4737648AApparatus for detecting fibrous particle sizes by detecting scattered light at different anglesVG INSTR GROUP·Filed 1986·Granted Apr 12, 1988·29 cites·23 claims
- 2069US4889319ABakeable vacuum systemsVG INSTR GROUP·Filed 1988·Granted Dec 26, 1989·35 cites·6 claims
- 2168US5091645ASelectable-resolution charged-particle beam analyzersVG INSTR GROUP·Filed 1990·Granted Feb 25, 1992·22 cites·18 claims
- 2267US4615591AMechanical positioning device for scientific instrumentsVG INSTR GROUP·Filed 1984·Granted Oct 7, 1986·22 cites·20 claims
- 2366US4912324AGlow discharge spectrometerVG INSTR GROUP·Filed 1989·Granted Mar 27, 1990·22 cites·22 claims
- 2466US4829178AApparatus for surface analysisVG INSTR GROUP·Filed 1987·Granted May 9, 1989·14 cites·21 claims
- 2566US4727249AMagnetic sector mass spectrometerVG INSTR GROUP·Filed 1986·Granted Feb 23, 1988·14 cites·28 claims
- 2663US4593196ACharged particle energy spectrometerVG INSTR GROUP·Filed 1984·Granted Jun 3, 1986·11 cites·19 claims
- 2762US5036195AGas analyzerVG INSTR GROUP·Filed 1989·Granted Jul 30, 1991·19 cites·29 claims
- 2862US4723076ADouble focusing mass spectrometersVG INSTR GROUP·Filed 1986·Granted Feb 2, 1988·11 cites·26 claims
- 2959US5184016AGlow discharge spectrometryVG INSTR GROUP·Filed 1991·Granted Feb 2, 1993·30 cites·23 claims
- 3059US5034605ASecondary ion mass spectrometer with independently variable extraction fieldVG INSTR GROUP·Filed 1989·Granted Jul 23, 1991·14 cites·22 claims
- 3148US4883957AMass spectrometer including cooling for the ion collection amplifiersVG INSTR GROUP·Filed 1988·Granted Nov 28, 1989·8 cites·21 claims
- 3247US4945774ASample treatment apparatusVG INSTR GROUP·Filed 1988·Granted Aug 7, 1990·18 cites·16 claims
- 3347US4942296ASuper-critical fluid mass spectrometerVG INSTR GROUP·Filed 1988·Granted Jul 17, 1990·6 cites·15 claims
- 3445US4487461ARack mounting systemVG INSTR GROUP·Filed 1983·Granted Dec 11, 1984·14 cites·6 claims
- 3542US4891515ASolution analyzing mass spectrometerVG INSTR GROUP·Filed 1988·Granted Jan 2, 1990·12 cites·10 claims
- 3639US5159194AMethod and apparatus for mass spectrometryVG INSTR GROUP·Filed 1991·Granted Oct 27, 1992·4 cites·17 claims
- 3739US4769542ACharged particle energy analyzerVG INSTR GROUP·Filed 1986·Granted Sep 6, 1988·8 cites·19 claims
- 3838US4840074AMulti-stream fluid sampling valveVG INSTR GROUP·Filed 1988·Granted Jun 20, 1989·14 cites·20 claims
- 3937US5134287ADouble-focussing mass spectrometerVG INSTR GROUP·Filed 1989·Granted Jul 28, 1992·2 cites·16 claims
- 4033US5026454AVacuum evaporation and depositionVG INSTR GROUP·Filed 1988·Granted Jun 25, 1991·7 cites·24 claims
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