Granted Patent
Utility
US 4,328,630 · App. 06/206,616
Pullyoke assembly for a scraper
Inventors:
Richard A. Hood, Dale C. Greig, Ralph E. Nemecek
Patented Case
View Patent ↗
Granted: May 11, 1982
Filed: Nov 13, 1980
Inventors
Richard A. Hood
Dale C. Greig
Ralph E. Nemecek
Assignee (at issue)
General Motors LLC
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.