Granted Patent
Utility
US 4,597,532 · App. 06/677,652
Material breakup device for manure spreaders
Inventors:
Gilbert W. Linde, Norman M. Stauffer, Warren H. Brackbill
Patented Case
View Patent ↗
Granted: Jul 1, 1986
Filed: Dec 3, 1984
Inventors
Gilbert W. Linde
Norman M. Stauffer
Warren H. Brackbill
Assignee (at issue)
Sperry Corp.
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.