IP Library › Granted Patent US 4,074,830
Granted Patent Utility
US 4,074,830 · App. 05/508,672

Compressed air seed planter

Inventors: Charles E. Adams, Harold E. Quackenbush, Paul H. Harrer, Le Roy Langford, Alvin L. Cleek
Patented Case View Patent ↗
Granted: Feb 21, 1978 Filed: Sep 23, 1974
Inventors
Charles E. Adams
Harold E. Quackenbush
Paul H. Harrer
Le Roy Langford
Alvin L. Cleek
Assignee (at issue)
Allis-Chalmers Corporation

This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,074,830
App. No.
05/508,672
Filed
1974-09-23
Granted
1978-02-21
Kind
A