Granted Patent
Utility
US 4,976,321 · App. 07/331,656
Horizontal earth boring machine and method
Inventor:
Brad Van Meter
Patented Case
View Patent ↗
Granted: Dec 11, 1990
Filed: Mar 29, 1989
Inventor
Brad Van Meter
Assignee (at issue)
McLaughlin Manufacturing 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.