Granted Patent
Utility
US 4,488,545 · App. 06/448,449
Catheter placement device
Inventor:
S. Nancy Shen
Patented Case
View Patent ↗
Granted: Dec 18, 1984
Filed: Dec 10, 1982
Inventor
S. Nancy Shen
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.