Granted Patent
Utility
US 4,776,244 · App. 06/874,397
Open-end wrench
Inventors:
Gene E. Olson, Paul Lemens
Patented Case
View Patent ↗
Granted: Oct 11, 1988
Filed: Jun 16, 1986
Inventors
Gene E. Olson
Paul Lemens
Assignee (at issue)
Snap-on Tools Company
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.