Granted Patent
Utility
US 4,551,122 · App. 06/468,654
Manufacture of poly-V sheet metal pulleys and product
Inventors:
Derald H. Kraft, Gary L. Hitchcock
Patented Case
View Patent ↗
Granted: Nov 5, 1985
Filed: Feb 22, 1983
Inventors
Derald H. Kraft
Gary L. Hitchcock
Assignee (at issue)
Dyneer Corporation
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.