Granted Patent
Utility
US 4,576,589 · App. 06/479,303
Trocar
Inventors:
Robert G. Kraus, Enora S. Kunica, Joseph J. Praderio
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: Mar 28, 1983
Inventors
Robert G. Kraus
Enora S. Kunica
Joseph J. Praderio
Assignee (at issue)
Codman & Shurtleff, 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.