Granted Patent
Utility
US 4,863,441 · App. 07/150,340
Venous return catheter
Inventors:
Erin J. Lindsay, James B. Howell
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Jan 27, 1988
Inventors
Erin J. Lindsay
James B. Howell
Assignee (at issue)
Minnesota Mining and Manufacturing 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.