Granted Patent
Utility
US 5,617,868 · App. 08/347,151
Pulse wave detecting apparatus
Inventors:
Chikao Harada, Yuji Matsubara
Patented Case
View Patent ↗
Granted: Apr 8, 1997
Filed: Nov 22, 1994
Inventors
Chikao Harada
Yuji Matsubara
Assignee (at issue)
Colin Corporation
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.