Granted Patent
Utility
US 6,312,402 · App. 09/160,221
Ultrasound catheter for improving blood flow to the heart
Inventor:
Douglas R. Hansmann
Patented Case
View Patent ↗
Granted: Nov 6, 2001
Filed: Sep 24, 1998
Inventor
Douglas R. Hansmann
Assignee (at issue)
EKOS CORPORATION
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.