Granted Patent
Utility
US 4,580,153 · App. 06/633,980
Record material
Inventors:
Mitsuru Kondo, Nobuo Kanda, Akio Noguchi, Yukio Takayama
Patented Case
View Patent ↗
Granted: Apr 1, 1986
Filed: Jul 24, 1984
Inventors
Mitsuru Kondo
Nobuo Kanda
Akio Noguchi
Yukio Takayama
Assignee (at issue)
Kanzaki Paper Manufacturing 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.