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Air-Valve Cage for Air-Brake Pumps
Patent for an air valve cage for air brake pumps which reduces the wear on the air brake pump and substantially reduces the maintenance costs of the system.
Date:
February 16, 1909
Creator:
Mattingly, James
System:
The Portal to Texas History
Spirometer
Patent for a spirometer. Illustartion included.
Date:
August 16, 1904
Creator:
Lyttleton, Henry Thomas
System:
The Portal to Texas History