Resource Type
Counties
2 Matching Results
Results open in a new window/tab.
Results:
1 - 2 of
2
Oxygen-Generator
Patent for an oxygen generator that refills as it is emptied.
Date:
February 7, 1911
Creator:
Bradley, Richard Clinton
System:
The Portal to Texas History
Pipe-Wrench.
Patent for improvements to pipe wrenches to a more simple design.
Date:
February 16, 1915
Creator:
Lewis, Guy V.
System:
The Portal to Texas History