Granted Patent
Utility
US 4,289,555 · App. 06/126,266
Method of making polymeric hose
Inventors:
Doyle V. Haren, William M. Edwards
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Mar 3, 1980
Inventors
Doyle V. Haren
William M. Edwards
Assignee (at issue)
DayCo Holdings, LP
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.