Granted Patent
Utility
US 6,073,939 · App. 09/092,552
Locking chuck
Inventors:
Stephen W. Steadings, William C. Buck, Christopher B. Barton
Patented Case
View Patent ↗
Granted: Jun 13, 2000
Filed: Jun 5, 1998
Inventors
Stephen W. Steadings
William C. Buck
Christopher B. Barton
Assignee (at issue)
Power Tool Holders 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.