Granted Patent
Utility
US 4,446,638 · App. 06/453,437
Dipper tip retaining pin
Inventors:
Raymond J. Novotny, James P. Mulder
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Dec 27, 1982
Inventors
Raymond J. Novotny
James P. Mulder
Assignee (at issue)
Abex 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.