Granted Patent
Utility
US 5,891,087 · App. 08/818,679
Mixing syringe
Inventors:
Seiji Ohtani, Nobuo Tanaka, Katsuyuki Yokokawa, Teruo Matsuda
Patented Case
View Patent ↗
Granted: Apr 6, 1999
Filed: Mar 14, 1997
Inventors
Seiji Ohtani
Nobuo Tanaka
Katsuyuki Yokokawa
Teruo Matsuda
Assignees (at issue)
Takeda Chemical Industries Ltd.
ARTE
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.