Resource Type

Agricultural Machine. (open access)

Agricultural Machine.

Patent for an agricultural machine, a frame structure that can hold multiple types of agricultural devices and allows for the proper adjustment and manipulation of said devices without changing the frame's structure.
Date: December 30, 1919
Creator: Northcutt, John & Crawford, Miner
System: The Portal to Texas History
Whiffletree (open access)

Whiffletree

Patent for a whiffletree. Illustration included.
Date: December 10, 1912
Creator: Jackson, Oliver S.
System: The Portal to Texas History