Granted Patent
Utility
US 4,986,830 · App. 07/410,852
Valvuloplasty catheter with balloon which remains stable during inflation
Inventors:
Robert C. Owens, Mark A. Rydell
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Sep 22, 1989
Inventors
Robert C. Owens
Mark A. Rydell
Assignee (at issue)
Schneider (USA) 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.