Granted Patent
Utility
US 4,970,922 · App. 07/488,415
Torque driving tool and retainer for driven member
Inventor:
Bert Krivec
Patented Case
View Patent ↗
Granted: Nov 20, 1990
Filed: Mar 1, 1990
Inventor
Bert Krivec
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.