Granted Patent
Utility
US 4,668,965 · App. 06/815,791
Method of purging impurities from a printing head
Inventors:
Yasuhiko Tanaka, Yoshiaki Kimura
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: Jan 3, 1986
Inventors
Yasuhiko Tanaka
Yoshiaki Kimura
Assignee (at issue)
Konishiroku Photo Industry Co., 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.