Resource Type
Counties
3 Matching Results
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Nut-Lock.
Patent for a nut lock that keeps bolts attached extra tightly.
Date:
January 31, 1911
Creator:
Greer, Benjamin J.
System:
The Portal to Texas History
Nut-Lock.
Patent for a nut lock that is easy to manufacture.
Date:
January 3, 1911
Creator:
Dowell, Lawson H.
System:
The Portal to Texas History
Road-Grader
Patent for an improvement or update to a device called a road-grader. This patented upgrade will make the use of a road-grader easier.
Date:
January 18, 1916
Creator:
Harris, Elie B.
System:
The Portal to Texas History