Granted Patent
Utility
US 6,811,399 · App. 10/090,111
Torque lock for ultrasonic swivelable inserts and method
Inventors:
Anisur Rahman, Shu Chen, Patricia Parker
Patented Case
View Patent ↗
Granted: Nov 2, 2004
Filed: Mar 4, 2002
Inventors
Anisur Rahman
Shu Chen
Patricia Parker
Assignee (at issue)
HU-FRIEDY MFG. CO., LLC
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.