Resource Type
Counties
3 Matching Results
Results open in a new window/tab.
Results:
1 - 3 of
3
Burglar-Alarm
Patent for improvements in burglar alarms, with horns and sirens.
Date:
March 8, 1921
Creator:
Sefcik, Francis
System:
The Portal to Texas History
Incubator
Patent for an incubator designed to maintain temperature automatically.
Date:
September 27, 1921
Creator:
Kovar, Joe
System:
The Portal to Texas History
Gearing.
Patent for a speed transmission device that simply and efficiently changes the gears in an automobile especially at fluctuating speeds.
Date:
September 13, 1921
Creator:
Anderson, Bert
System:
The Portal to Texas History