E21C 25/34

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
7360844 Geosteering detectors for boring-type continuous minersJul 29, 04Apr 22, 08THE MOSAIC COMPANY
5031964 Cutting chain for mining machinesJun 21, 90Jul 16, 91INDRESCO, INC.
4717206 Endless chains comprised of interdigitated link elements having a Y-shaped configurationMay 02, 85Jan 05, 88The Cincinnati Mine Machinery Company
4674803 Endless chains comprised of interdigitated link elements having an H-shaped configurationMay 02, 85Jun 23, 87The Cincinnati Mine Machinery Company