Granted Patent
Utility
US 4,367,690 · App. 06/226,735
Heated roller type fixing apparatus
Inventors:
Hirofumi Sakaguchi, Ken Matsumoto, Keiji Masuda
Patented Case
View Patent ↗
Granted: Jan 11, 1983
Filed: Jan 21, 1981
Inventors
Hirofumi Sakaguchi
Ken Matsumoto
Keiji Masuda
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.