1 Matching Results
Results open in a new window/tab.
Results:
1 - 1 of
1
Train-Order Signal.
Patent for a train order signal device, which sets off an alarm or signal when the train order pad is removed, which cannot be turned off until the pad is replaced.
Date:
November 24, 1908
Creator:
Van Zandt, Luther H.
System:
The Portal to Texas History