Counties
1 Matching Results
Results open in a new window/tab.
Results:
1 - 1 of
1
Rotary Engine
Patent for "a simple and efficient construction of engine including two parallel series of piston-heads and wherein steam will be supplied to the heads of each series alternately" (lines 9-13).
Date:
July 9, 1901
Creator:
Keith, Jonathan
System:
The Portal to Texas History