Hecla Mining Co - Company Profile

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Hecla Mining Co: Patents

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Publication Identifier	Document Type	Title	Classification-CPC	Publication Date
US11788411B2	Grant	Systems and methods of underhand closed bench mining	E21C37/16; E21C41/16; E21C41/22	October 17, 2023
US20230126105A1	Application	Systems and methods of underhand closed bench mining	E21C37/16; E21C41/16; E21C41/22	April 27, 2023
US10524771B2	Grant	Organ retraction device	A61B17/02; A61B17/0218; A61B2017/0212; A61B2017/0225	January 07, 2020
US20180263613A1	Application	Organ retraction device	A61B17/02; A61B17/0218; A61B2017/0212; A61B2017/0225	September 20, 2018
US7011756B2	Grant	In situ immobilization of metals within density variant bodies of water	B09C1/002; B09C1/10; C02F1/5236; C02F1/66; C02F2101/103; C02F2101/20; C02F2103/007; C02F2209/01; C02F2305/06; C02F3/345; C02F3/348; Y02E50/30; Y10S210/912; Y10S210/913; Y10S210/914	March 14, 2006

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