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Grain-Drill Attachment.
Patent for combining a plow and a grain drill into one device, to reduce the number of times the soil needs to be turned per planting.
Date:
August 29, 1915
Creator:
McAdams, William J.
System:
The Portal to Texas History
Film Feeding Mechanism for Cameras
Patent for a film feeding mechanism for cameras. Illustrations included.
Date:
August 6, 1912
Creator:
Caldwell, Elmer A.
System:
The Portal to Texas History