Granted Patent
Utility
US 5,344,520 · App. 07/806,362
Single-faced corrugated cardboard sheet making machine having an adjustable pressing means
Inventors:
Yukuharu Seki, Makoto Ando
Patented Case
View Patent ↗
Granted: Sep 6, 1994
Filed: Dec 13, 1991
Inventors
Yukuharu Seki
Makoto Ando
Assignee (at issue)
MITSUBISHI KOGYO KABUSHIKI KAISHA
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.