Granted Patent
Utility
US 5,227,049 · App. 07/743,037
Single-needle circuit for circulating blood outside the body in blood treatment apparatus
Inventors:
Jacques Chevallet, Jean-Claude Riquier, Carl-Henry rndal, Allan Petersen
Patented Case
View Patent ↗
Granted: Jul 13, 1993
Filed: Aug 9, 1991
Inventors
Jacques Chevallet
Jean-Claude Riquier
Carl-Henry rndal
Allan Petersen
Assignee (at issue)
Hospal Industrie
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.