Granted Patent
Utility
US 4,171,572 · App. 05/863,289
Light control apparatus for a dental handpiece
Inventor:
John E. Nash
Patented Case
View Patent ↗
Granted: Oct 23, 1979
Filed: Dec 22, 1977
Inventor
John E. Nash
Assignee (at issue)
Star Dental Manufacturing Co., 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.