Granted Patent
Utility
US 4,777,708 · App. 07/027,154
Method for manufacturing an exhaust manifold
Inventors:
Jon W. Harwood, Donald Kohler
Patented Case
View Patent ↗
Granted: Oct 18, 1988
Filed: Mar 17, 1987
Inventors
Jon W. Harwood
Donald Kohler
Assignee (at issue)
AP 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.