Granted Patent
Utility
US 5,343,883 · App. 07/998,378
Sonic dental device and method
Inventor:
Ronald K. Murayama
Patented Case
View Patent ↗
Granted: Sep 6, 1994
Filed: Dec 30, 1992
Inventor
Ronald K. Murayama
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.