Granted Patent
Utility
US 4,548,090 · App. 06/589,034
Supersonic vibration driven motor device
Inventor:
Toshiiku Sashida
Patented Case
View Patent ↗
Granted: Oct 22, 1985
Filed: Mar 12, 1984
Inventor
Toshiiku Sashida
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.