Granted Patent
Utility
US 4,334,327 · App. 06/106,175
Ureteral prosthesis
Inventors:
Donald J. Lyman, Richard Middleton
Patented Case
View Patent ↗
Granted: Jun 15, 1982
Filed: Dec 21, 1979
Inventors
Donald J. Lyman
Richard Middleton
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.