Granted Patent
Utility
US 4,502,159 · App. 06/407,529
Tubular prostheses prepared from pericardial tissue
Inventors:
E. Aubrey Woodroof, Philip S. Yang
Patented Case
View Patent ↗
Granted: Mar 5, 1985
Filed: Aug 12, 1982
Inventors
E. Aubrey Woodroof
Philip S. Yang
Assignee (at issue)
Shiley Incorporated
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.