Granted Patent
Utility
US 6,520,509 · App. 09/635,843
Screw guide device with drill bit/screw bit and counter sink/drill stop means
Inventors:
Kailash C. Vasudeva, Maz A. Hasan
Patented Case
View Patent ↗
Granted: Feb 18, 2003
Filed: Aug 11, 2000
Inventors
Kailash C. Vasudeva
Maz A. Hasan
Assignee (at issue)
Maxtech Manufacturing 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.