Granted Patent
Utility
US 4,985,199 · App. 07/250,111
Fuel spacer of separate cell type and manufacturing method therefor
Inventors:
Makoto Irube, Junjiro Nakajima, Hajime Umehara, Nobuo Tada, Masayoshi Ajima
Patented Case
View Patent ↗
Granted: Jan 15, 1991
Filed: Sep 28, 1988
Inventors
Makoto Irube
Junjiro Nakajima
Hajime Umehara
Nobuo Tada
Masayoshi Ajima
Assignee (at issue)
HITACHI, 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.