Granted Patent
Utility
US 6,260,857 · App. 09/478,322
Quick-change three-jaw drill chuck
Inventors:
Thomas J. Wienhold, James L. Wienhold
Patented Case
View Patent ↗
Granted: Jul 17, 2001
Filed: Jan 6, 2000
Inventors
Thomas J. Wienhold
James L. Wienhold
Assignee (at issue)
James L. Wienhold
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.