Granted Patent
Utility
US 4,952,312 · App. 07/275,378
Method for winding the fibres of exchange devices, such as blood oxygenators and the like, and an exchange device produced by this method
Inventors:
Piero Zantonelli, Sergio Graglia
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Nov 23, 1988
Inventors
Piero Zantonelli
Sergio Graglia
Assignee (at issue)
Sorin Biomedica S.p.A.
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.