Institut Gornogo Dela Sibirskogo Otdelenia Akademii Nauk SSSR

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5495685 Excavator bucketExpiredJun 16, 95Mar 05, 96[E02F]
5057198 Method and electrolyzer for softening waterExpiredFeb 08, 90Oct 15, 91[B03C, C25B, B01D]
4947941 Single-stroke pneumatic apparatusExpiredJun 20, 88Aug 14, 90[B23B]
4867252 Single-stroke pneumatic apparatusExpiredJun 16, 88Sep 19, 89[B25D]
4776407 Clamping attachment to a device for driving rod elements of low rigidity into the groundExpiredJul 02, 86Oct 11, 88[E21B]
4722403 Annular air-hammer apparatus for drilling holesExpiredAug 05, 86Feb 02, 88[E21B]
4697647 Reversible percussive action machineExpiredDec 11, 85Oct 06, 87[E21B]
4690225 Percussive toolExpiredSep 20, 85Sep 01, 87[B25D]
4653596 Percussive air toolExpiredOct 04, 85Mar 31, 87[B25D]
4637476 Percussive action machine for making holes in the groundExpiredApr 04, 85Jan 20, 87[E21B]
4629008 Reversible percussive action machineExpiredJun 05, 84Dec 16, 86[E21B]
4606414 Percussive air toolExpiredMar 04, 82Aug 19, 86[B25D]
4570723 Machine for driving holes in the groundExpiredMay 16, 84Feb 18, 86[B25F]
4440240 Method of making holes in the soil and apparatus for performing this methodExpiredMay 18, 81Apr 03, 84[E21B]
4398609 Apparatus for sinking wells in the groundExpiredMar 12, 82Aug 16, 83[E21B]
4194435 Percussion mechanismExpiredJun 30, 77Mar 25, 80[F01L]
4194611 Vibrator for importing vibration to a working platformExpiredNov 06, 78Mar 25, 80[B65G]

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