Granted Patent
Utility
US 6,199,872 · App. 09/373,629
Quick-release mechanism for screwdriver bits and the like
Inventor:
Maz A. Hasan
Patented Case
View Patent ↗
Granted: Mar 13, 2001
Filed: Aug 13, 1999
Inventor
Maz A. Hasan
Assignee (at issue)
Maxtech Consumer Products Ltd.
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.