Granted Patent
Utility
US 4,947,855 · App. 07/310,898
Blood pressure measuring apparatus
Inventors:
Hifumi Yokoe, Chikao Harada
Patented Case
View Patent ↗
Granted: Aug 14, 1990
Filed: Feb 16, 1989
Inventors
Hifumi Yokoe
Chikao Harada
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.