Granted Patent
Utility
US 5,683,647 · App. 08/199,203
Process for producing resin hose
Inventors:
Minoru Kawasaki, Hiromasa Ishiguro
Patented Case
View Patent ↗
Granted: Nov 4, 1997
Filed: Jun 13, 1994
Inventors
Minoru Kawasaki
Hiromasa Ishiguro
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.