Granted Patent
Utility
US 4,743,788 · App. 06/929,351
Input frequency control device for surface acoustic wave motor
Inventors:
Tadao Takagi, Shigemasa Sato, Kazuo Hakamada
Patented Case
View Patent ↗
Granted: May 10, 1988
Filed: Nov 12, 1986
Inventors
Tadao Takagi
Shigemasa Sato
Kazuo Hakamada
Assignee (at issue)
Nippon Kogaku K.K.
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.