Spring tooth harrow
United States Patent 3033296
US Patent References:
Wheel drag
- - 2286619

Implement lift
- - 2637564

Disk harrow
- - 2760323

Leveling mechanism for rigid frame disk harrows
- - 2767538

Multiple-sectioned farm implement
- - 2828680


Inventors:
Kaufman, Edward J.
Jacob, Kaufman
Publication Date:
05/08/1962
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Assignee:
Kaufman, Edward J.
Jacob, Kaufman
Primary Class:
172/629
Other Classes:
172/456, 172/311, 172/421
International Classes:
A01B35/06; A01B35/00