Granted Patent
Utility
US 4,618,868 · App. 06/767,350
Ink jet recording apparatus
Inventors:
Takahiro Yamada, Satoshi Namekawa, Eiji Yoshino, Yasumasa Matsuda
Patented Case
View Patent ↗
Granted: Oct 21, 1986
Filed: Aug 21, 1985
Inventors
Takahiro Yamada
Satoshi Namekawa
Eiji Yoshino
Yasumasa Matsuda
Assignees (at issue)
HITACHI, LTD.
Hitachi Koki Co., Ltd.
Hitachi Seiko 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.