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Airborne radiometric survey of upper Michigan and parts of Wisconsin
A report regarding an airborne radiometric survey of upper Michigan and Parts of Wisconsin
Date:
October 16, 1957
Creator:
Smith, Burton C. & Fickel, Clarence W.
Object Type:
Report
System:
The UNT Digital Library
Frame-Lifting Device for Disk Plows or Similar Implements.
Patent for "improvements in disk plows and similar implements, and especially to means employed for raising and lowering the frames of said plows in order to regulate the depth of the furrow" (lines 9-13).
Date:
October 30, 1900
Creator:
Hendon, Walter Preston
Object Type:
Patent
System:
The Portal to Texas History