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Patents

 Subject
Subject Source: Library of Congress Subject Headings

Found in 2 Collections and/or Records:

Anaconda Copper Mining Company records

 Collection
Identifier: MC-169
Abstract This collection consists of records (1876-1974) of the Anaconda Copper Mining Company and contains correspondence, court papers, financial and production records, legal documents, organizational records, subject files, and other materials for the Anaconda Copper Mining Company and many of its predecessor and subsidiary companies and departments. Among the major subgroups are General Office; Big Blackfoot Milling Company; Bitter Root Development Company; Boston and Montana Consolidated Copper...
Dates: 1876-1974

Walter C. Giebel papers

 Collection
Identifier: MC-189
Abstract Walter Giebel was a Montana mining investor and businessman. His papers (1937-1978) include incoming and outgoing correspondence dealing with mining and ore processing, patents, political and monetary policies for the state, and the history of Nelson, Wisconsin; financial records; legal documents; maps; production records for the Gulf Claim and the Star Mine of Neihart, the Hilger Ore Milling Company of Lewistown, and the Tamarack Mine near Sheridan; writings; clippings; and miscellany. Also...
Dates: 1937-1978