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3 Matching Results
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Combined Level, Grade, Distance, and Elevation Finder.
Patent for a tool that acts as a combined plumb and spirit level.
Date:
December 19, 1905
Creator:
Barclay, Charles B.
System:
The Portal to Texas History
Scraper
Patent for Scraper
Date:
September 19, 1916
Creator:
Spears, Wiliiam I.
System:
The Portal to Texas History
Power-Motor.
Patent for a power-motor that a "gearing mounted on a frame, winding-drum, and horse-power, elevations and weights, with means for operating and regulating the same" (lines 12-15).
Date:
May 19, 1896
Creator:
Levings, Enoc
System:
The Portal to Texas History