Granted Patent
Utility
US 4,249,896 · App. 05/947,215
Compliantly mountable turbine cartridge assembly for gas-driven dental handpiece
Inventor:
Frank W. Kerfoot, Jr.
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Sep 29, 1978
Inventor
Frank W. Kerfoot, Jr.
Assignee (at issue)
Syntex (U.S.A.) 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.