Granted Patent
Utility
US 4,609,925 · App. 06/696,418
Method for removing air bubbles or solid impurities from the printing head of a drop-on-demand type ink jet printer
Inventors:
Taketo Nozu, Yoshiaki Kimura, Yasuhiko Tanaka
Patented Case
View Patent ↗
Granted: Sep 2, 1986
Filed: Jan 30, 1985
Inventors
Taketo Nozu
Yoshiaki Kimura
Yasuhiko Tanaka
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.