Granted Patent
Utility
US 6,398,552 · App. 09/756,423
Torque indicator ratchet wrench for dentistry
Inventors:
Dan P. Rogers, Thomas Tait Robb
Patented Case
View Patent ↗
Granted: Jun 4, 2002
Filed: Jan 8, 2001
Inventors
Dan P. Rogers
Thomas Tait Robb
Assignee (at issue)
Implant Innovations, 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.