COMMONWEALTH SCIENTIFIC CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5256930 Cooled plasma sourceExpiredFeb 10, 92Oct 26, 93[H01J, H05H]
5177398 Grid assembly for ion beam sources and method thereforExpiredMay 31, 90Jan 05, 93[H01J]
4481062 Electron bombardment ion sourcesExpiredFeb 07, 84Nov 06, 84[C23C]
4403567 Workpiece holderExpiredAug 21, 80Sep 13, 83[B05C]
4187801 Method and apparatus for transporting workpiecesExpiredDec 12, 77Feb 12, 80[C23C]

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