Granted Patent
Utility
US 5,238,000 · App. 07/752,016
Pulse wave detecting apparatus
Inventor:
Minoru Niwa
Patented Case
View Patent ↗
Granted: Aug 24, 1993
Filed: Aug 29, 1991
Inventor
Minoru Niwa
Assignee (at issue)
Colin Electronics Co., 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.