Granted Patent
Utility
US 5,437,212 · App. 08/160,151
Ratcheting screwdriver
Inventors:
Christopher D. Thompson, Joseph R. Hoepfl
Patented Case
View Patent ↗
Granted: Aug 1, 1995
Filed: Dec 2, 1993
Inventors
Christopher D. Thompson
Joseph R. Hoepfl
Assignee (at issue)
Snap-on Incorporated
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.