PAURAT GMBH

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4978173 Holder for cutter in mining machineExpiredApr 05, 90Dec 18, 90[E21C]
4695098 Excavator, particularly for continuous strip mining of mineralsExpiredMay 16, 86Sep 22, 87[E21C]
4664448 Shear-type loader for a tunnel and gallery excavatorExpiredJan 17, 86May 12, 87[E21C]
4610573 Tunneling machineExpiredAug 01, 85Sep 09, 86[E21D]
4557373 System for conveying bulk material and people in a mineExpiredMar 09, 84Dec 10, 85[B65G]
4499993 Belt-type bulk-material conveyor for underground useExpiredJan 27, 83Feb 19, 85[B65G]
4470635 Method and apparatus for excavating a tunnel or gallery faceExpiredJan 27, 83Sep 11, 84[E21C]
4278293 Apparatus for advancing a low-height drift through a subterranean structureExpiredNov 02, 79Jul 14, 81[E21C]
4274675 Shaft-sinking apparatus with milling head and central worm conveyorExpiredAug 23, 79Jun 23, 81[E21D]
4247997 Trench excavating and shoring apparatusExpiredMar 09, 79Feb 03, 81[E02D, E02F]
4231618 Tunnel-excavating machineExpiredDec 02, 77Nov 04, 80[E21C]

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