Granted Patent
Utility
US 5,370,194 · App. 08/049,121
Drive head assembly for drilling machine
Inventor:
Llewellan Anderson
Patented Case
View Patent ↗
Granted: Dec 6, 1994
Filed: Apr 19, 1993
Inventor
Llewellan Anderson
Assignee (at issue)
Robbins, 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.