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Ice-Machine
Patent for an icebox that can be combined with a refrigerator. The icebox will spray the ammonia compressor coil with water, as well as inducing a forced circulation of water in the icebox's freezing tank.
Date:
May 22, 1920
Creator:
Grant, Willburn C.
System:
The Portal to Texas History
Power-Driven-Implement Frame
Patent for improvements in power driven implement frames, specifically in tractors, with illustrations.
Date:
January 13, 1920
Creator:
Armstrong, Ira
System:
The Portal to Texas History