Granted Patent
Utility
US 4,297,026 · App. 06/106,157
Cleaning apparatus for copy machines
Inventors:
Hiroyuki Honda, Hiroaki Ura
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Dec 21, 1979
Inventors
Hiroyuki Honda
Hiroaki Ura
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.