Granted Patent
Utility
US 4,686,754 · App. 06/623,171
Method for manufacturing a heat insulating shaped bar
Inventors:
Yoshitaka Nagai, Nobushige Doguchi
Patented Case
View Patent ↗
Granted: Aug 18, 1987
Filed: Jun 22, 1984
Inventors
Yoshitaka Nagai
Nobushige Doguchi
Assignee (at issue)
Yoshida Kogyo 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.