Granted Patent
Utility
US 4,951,533 · App. 07/438,182
Screwdriver with enhanced grip handle
Inventor:
George Hillinger
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Nov 20, 1989
Inventor
George Hillinger
Assignee (at issue)
Alltrade 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.