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Mining elevator
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Patent number 9,272,881
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Issue date Mar 1, 2016
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China University of Mining and Technology
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Zhencai Zhu
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B66 - HOISTING LIFTING HAULING
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Cage deck
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Patent number 4,695,219
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Issue date Sep 22, 1987
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Vaal Reefs Mining and Exploration Co., Ltd.
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Samuel B. McGimpsey
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B66 - HOISTING LIFTING HAULING
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2354525
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Patent number 2,354,525
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Issue date Jul 25, 1944
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B66 - HOISTING LIFTING HAULING
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2327913
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Patent number 2,327,913
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Issue date Aug 24, 1943
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B66 - HOISTING LIFTING HAULING
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1695690
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Patent number 1,695,690
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Issue date Dec 18, 1928
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B66 - HOISTING LIFTING HAULING
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1541144
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Patent number 1,541,144
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Issue date Jun 9, 1925
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B66 - HOISTING LIFTING HAULING
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1433459
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Patent number 1,433,459
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Issue date Oct 24, 1922
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B66 - HOISTING LIFTING HAULING
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1335080
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Patent number 1,335,080
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Issue date Mar 30, 1920
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B66 - HOISTING LIFTING HAULING
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699135
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Patent number 699,135
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Issue date May 6, 1902
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B66 - HOISTING LIFTING HAULING
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284895
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Patent number 284,895
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Issue date Sep 11, 1883
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B66 - HOISTING LIFTING HAULING