Granted Patent
Utility
US 6,679,589 · App. 10/158,457
Ink jet print head and method of production thereof
Inventors:
Hiroshi Takahagi, Nobuhiro Noto, Yutaka Shoji, Yoshitaka Akiyama, Kenji Yamada, Kenichi Kugai
Patented Case
View Patent ↗
Granted: Jan 20, 2004
Filed: May 31, 2002
Inventors
Hiroshi Takahagi
Nobuhiro Noto
Yutaka Shoji
Yoshitaka Akiyama
Kenji Yamada
Kenichi Kugai
Assignee (at issue)
Hitachi Printing Solutions, 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.