Granted Patent
Utility
US 5,807,259 · App. 08/804,915
Ultrasonic continuous wave doppler blood flow-meter
Inventors:
Yasuhiro Nakamura, Hisashi Akiyama, Sueo Baba
Patented Case
View Patent ↗
Granted: Sep 15, 1998
Filed: Feb 24, 1997
Inventors
Yasuhiro Nakamura
Hisashi Akiyama
Sueo Baba
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, LTD.
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.