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Shaft Sinking Apparatus Patents

 Collection — sc_box: MS 2, Folder: 20
Identifier: MS-612

Collection Scope and Content Summary

Patents, 1943-1944, issued to John Murray Riddell for improvements to mine shaft sinking apparatus. Includes patent issued by the United States in 1943 as well as a patent issued by the Union of South Africa, a dominion of Great Britain.

Dates

  • 1943-1944

Access

Available for use in the Michigan Technological University Archives and Copper Country Historical Collections.

Biography

Extent

0.01 Cubic Feet (1 folder)

Language of Materials

English

Abstract

Patents, 1943-1944, issued to John Murray Riddell for improvements to mine shaft sinking apparatus. Includes patent issued by the United States in 1943 as well as a patent issued by the Union of South Africa, a dominion of Great Britain.

Processing History

Elizabeth Russell,2/5/2010

Title
Shaft Sinking Apparatus Patents
Author
Finding aid prepared by Elizabeth Russell
Date
2/5/2010
Language of description
Undetermined
Script of description
Code for undetermined script
Language of description note
Description is in English

Repository Details

Part of the Michigan Technological University Archives and Copper Country Historical Collections Repository

Contact:
1400 Townsend Drive
Houghton 49931 U.S.A. US