Granted Patent
Utility
US 4,650,377 · App. 06/707,926
Right angle drill
Inventor:
Paul A. Biek
Patented Case
View Patent ↗
Granted: Mar 17, 1987
Filed: Mar 4, 1985
Inventor
Paul A. Biek
Assignee (at issue)
Dresser 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.