Granted Patent
Utility
US 5,688,252 · App. 08/535,915
Syringe
Inventors:
Terumi Matsuda, Nobuo Tanaka
Patented Case
View Patent ↗
Granted: Nov 18, 1997
Filed: Sep 28, 1995
Inventors
Terumi Matsuda
Nobuo Tanaka
Assignee (at issue)
Takeda Chemical Industries Ltd.
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.