Resource Type
Counties
2 Matching Results
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Nut-Lock.
Patent for a nut lock, which stops the nut from rotating.
Date:
December 8, 1908
Creator:
Brown, John J.
System:
The Portal to Texas History
Railway Switch
Patent for a railway switch. Illustration included.
Date:
December 30, 1904
Creator:
Riley, George Marshall
System:
The Portal to Texas History