Granted Patent
Utility
US 6,692,422 · App. 10/091,463
Roll
Inventors:
Koji Yamaguchi, Yukio Ohyama, Tsutomu Saito, Naoaki Sasakibara
Patented Case
View Patent ↗
Granted: Feb 17, 2004
Filed: Mar 7, 2002
Inventors
Koji Yamaguchi
Yukio Ohyama
Tsutomu Saito
Naoaki Sasakibara
Assignee (at issue)
TOKAI RUBBER INDUSTRIES, 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.