Granted Patent
Utility
US 4,842,589 · App. 06/935,378
Intercavity catheter
Inventors:
David C. Fecht, Thomas B. Ferguson, Ronald Crouther, Alan B. Ranford
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Nov 26, 1986
Inventors
David C. Fecht
Thomas B. Ferguson
Ronald Crouther
Alan B. Ranford
Assignee (at issue)
Sherwood Medical Company
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.