Granted Patent
Utility
US 4,290,517 · App. 05/964,330
Method and apparatus for reducing loader bar impact
Inventor:
Harry C. Hafferkamp
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Nov 29, 1978
Inventor
Harry C. Hafferkamp
Assignee (at issue)
Owens-Illinois Inc.
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.