Granted Patent
Utility
US 4,486,868 · App. 06/305,358
Ultrasonic wave conversion apparatus
Inventors:
Masao Kodera, Sigeyuki Akita
Patented Case
View Patent ↗
Granted: Dec 4, 1984
Filed: Sep 24, 1981
Inventors
Masao Kodera
Sigeyuki Akita
Assignee (at issue)
NIPPON SOKEN, 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.