Granted Patent
Utility
US 4,990,037 · App. 07/388,985
Portable boring machine
Inventor:
David S. Strait
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: Aug 2, 1989
Inventor
David S. Strait
Assignee (at issue)
Climax Portable Machine Tools, 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.