Granted Patent
Utility
US 6,557,986 · App. 10/191,614
Ink jet head and method for the manufacture thereof
Inventors:
Osamu Watanabe, Koji Matsuo, Kenji Tomita, Isaku Kanno
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Jul 9, 2002
Inventors
Osamu Watanabe
Koji Matsuo
Kenji Tomita
Isaku Kanno
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, 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.