Granted Patent
Utility
US 4,852,552 · App. 07/092,640
Sternal retractor
Inventor:
Aurelio Chaux
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Sep 3, 1987
Inventor
Aurelio Chaux
Assignee (at issue)
Pilling Co.
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.