Granted Patent
Utility
US 4,173,689 · App. 05/654,831
Synthetic polymer prosthesis material
Inventors:
Donald J. Lyman, Frank J. Fazzio
Patented Case
View Patent ↗
Granted: Nov 6, 1979
Filed: Feb 3, 1976
Inventors
Donald J. Lyman
Frank J. Fazzio
Assignee (at issue)
THE UNIVERSITY OF UTAH
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.