Granted Patent
Utility
US 4,406,621 · App. 06/259,987
Coupling ensemble for dental handpiece
Inventor:
Ronald L. Bailey
Patented Case
View Patent ↗
Granted: Sep 27, 1983
Filed: May 4, 1981
Inventor
Ronald L. Bailey
Assignee (at issue)
Young Dental Manufacturing Company 1, 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.