Pacific Western Systems

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6448184 Formation of diamond particle interconnectsExpiredNov 06, 98Sep 10, 02[H01L]
5763879 Diamond probe tipExpiredSep 16, 96Jun 09, 98[H02J]
4795977 Interface system for interfacing a device tester to a device under testExpiredMar 19, 87Jan 03, 89[G01R]
4736373 Memory tester having concurrent failure data readout and memory repair analysisExpiredAug 03, 81Apr 05, 88[G06F]
4718202 Method and apparatus for rounding the edges of semiconductive wafersExpiredAug 23, 82Jan 12, 88[B24B]
4661033 Apparatus for unloading wafers from a hot boatExpiredAug 22, 84Apr 28, 87[B65G]
4590422 Automatic wafer prober having a probe scrub routineExpiredJul 30, 81May 20, 86[B24B, B08B, G01R]
4500836 Automatic wafer prober with programmable tester interfaceExpiredOct 31, 80Feb 19, 85[G01R]
4460997 Memory tester having memory repair analysis capabilityExpiredJul 15, 81Jul 17, 84[G06F]
4460999 Memory tester having memory repair analysis under pattern generator controlExpiredJul 15, 81Jul 17, 84[G01R]
4292722 Renewable nut for a lead screw drive and method of making sameExpiredAug 13, 79Oct 06, 81[B23P, B22D]
4251772 Probe head for an automatic semiconductive wafer proberExpiredDec 26, 78Feb 17, 81[G01R]
4249846 Rotary vacuum seal for a wafer transport systemExpiredDec 20, 78Feb 10, 81[C23C]

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