Granted Patent
Utility
US 5,967,489 · App. 08/982,583
Fluid control apparatus
Inventors:
Masahiko Nakazawa, Kazuo Tsukada, Michio Yamaji, Hisashi Tanaka
Patented Case
View Patent ↗
Granted: Oct 19, 1999
Filed: Dec 2, 1997
Inventors
Masahiko Nakazawa
Kazuo Tsukada
Michio Yamaji
Hisashi Tanaka
Assignees (at issue)
Aera Japan Ltd.
Fujikin Incorporated
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.