Granted Patent
Utility
US 4,419,095 · App. 06/149,568
Cannula with radiopaque tip
Inventors:
Perry A. Nebergall, Robert C. French
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: May 14, 1980
Inventors
Perry A. Nebergall
Robert C. French
Assignee (at issue)
Shiley 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.