Granted Patent
Utility
US 5,613,954 · App. 08/342,926
Laparoscopic surgical Y-tube cannula
Inventors:
Charles L. Nelson, John Nguyen, Derrick Richardson, Heber Saravia
Patented Case
View Patent ↗
Granted: Mar 25, 1997
Filed: Nov 21, 1994
Inventors
Charles L. Nelson
John Nguyen
Derrick Richardson
Heber Saravia
Assignee (at issue)
STRYKER CORPORATION
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.