Granted Patent
Utility
US 6,185,847 · App. 08/932,748
Continuous shovel
Inventors:
Matthew F. Russell, Gerald Kaschmitter
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Sep 17, 1997
Inventors
Matthew F. Russell
Gerald Kaschmitter
Assignee (at issue)
R. A. Hanson Company, 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.