Granted Patent
Utility
US 5,520,639 · App. 08/407,867
Needleless hypodermic injection methods and device
Inventors:
Steven F. Peterson, Charles N. McKinnon, Jr., Paul Edward Smith, JR., Takaaki Nakagawa, Victor L. Bartholomew
Patented Case
View Patent ↗
Granted: May 28, 1996
Filed: Mar 21, 1995
Inventors
Steven F. Peterson
Charles N. McKinnon, Jr.
Paul Edward Smith, JR.
Takaaki Nakagawa
Victor L. Bartholomew
Assignee (at issue)
Bioject 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.