Granted Patent
Utility
US 5,581,909 · App. 08/211,267
Heat treatment apparatus for yarn
Inventors:
Kunihiko Ueda, Takao Sano, Shuko Arakane
Patented Case
View Patent ↗
Granted: Dec 10, 1996
Filed: Jul 27, 1994
Inventors
Kunihiko Ueda
Takao Sano
Shuko Arakane
Assignee (at issue)
TORAY INDUSTRIES, INC.
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.