Granted Patent
Utility
US 4,795,439 · App. 07/177,820
Spiral multi-lumen catheter
Inventor:
Robert L. Guest
Patented Case
View Patent ↗
Granted: Jan 3, 1989
Filed: Apr 8, 1988
Inventor
Robert L. Guest
Assignee (at issue)
Edward Weck 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.