Resource Type
Counties
2 Matching Results
Results open in a new window/tab.
Results:
1 - 2 of
2
Pump-Jack.
Patent for an improved version of "operating pumps and similar apparatus" (lines 8-9).
Date:
January 30, 1906
Creator:
York, Francis M.
System:
The Portal to Texas History
Equalizing Device for Pump-Rods.
Patent for an improved equalizing device for pump-rods used in hand or windmill pumps that increases the operating efficiency and decreases the manufacture cost of the device.
Date:
April 10, 1906
Creator:
Shipman, John Davis
System:
The Portal to Texas History