Granted Patent
Utility
US 5,184,412 · App. 07/896,278
Auger tooth locking mechanism
Inventors:
Martin W. Kopinski, George J. Bogdanich
Patented Case
View Patent ↗
Granted: Feb 9, 1993
Filed: Jun 10, 1992
Inventors
Martin W. Kopinski
George J. Bogdanich
Assignee (at issue)
Pengo 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.