Granted Patent
Utility
US 6,470,726 · App. 09/723,175
Method for manufacturing an extruded article changing in cross-section and an apparatus for extruding said extruded article
Inventors:
Makoto Murata, Koji Hasegawa, Masatoshi Enomoto
Patented Case
View Patent ↗
Granted: Oct 29, 2002
Filed: Nov 27, 2000
Inventors
Makoto Murata
Koji Hasegawa
Masatoshi Enomoto
Assignee (at issue)
Showa Denko K.K.
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.