Granted Patent
Utility
US 4,441,110 · App. 06/383,274
Printing head protecting device in ink jet printer
Inventors:
Siro Hatakeyama, Harutaro Oba, Yoshitaka Ukai
Patented Case
View Patent ↗
Granted: Apr 3, 1984
Filed: May 28, 1982
Inventors
Siro Hatakeyama
Harutaro Oba
Yoshitaka Ukai
Assignees (at issue)
Tokyo Electron Limited
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.