Granted Patent
Utility
US 5,643,335 · App. 08/643,081
Benign prostatic hyperplasia treatment catheter with urethral cooling
Inventors:
John M. Reid, James V. Kauphusman, Christopher H. Porter, Bruce H. Neilson
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: May 2, 1996
Inventors
John M. Reid
James V. Kauphusman
Christopher H. Porter
Bruce H. Neilson
Assignee (at issue)
Urologix, Inc.
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.