Granted Patent
Utility
US 4,390,132 · App. 06/232,696
Wood chipper
Inventors:
Marvin R. Hutson, Louis G. Dutmers
Patented Case
View Patent ↗
Granted: Jun 28, 1983
Filed: Feb 9, 1981
Inventors
Marvin R. Hutson
Louis G. Dutmers
Assignee (at issue)
Omark Industries, 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.