VG INSTRUMENTS GROUP LIMITED

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4926021 Reactive gas sample introduction system for an inductively coupled plasma mass spectrometerExpiredSep 09, 88May 15, 90[B23K]
4758723 Electron spectrometerExpiredMay 18, 87Jul 19, 88[H01J]
4737648 Apparatus for detecting fibrous particle sizes by detecting scattered light at different anglesExpiredSep 25, 86Apr 12, 88[G01N]
4615591 Mechanical positioning device for scientific instrumentsExpiredApr 13, 84Oct 07, 86[G02B]
4487461 Rack mounting systemExpiredMar 23, 83Dec 11, 84[A47B]

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