Granted Patent
Utility
US 4,729,802 · App. 06/819,369
Opener-disk heat-treating process and product
Inventors:
John A. Matalis, Thomas Watmough
Patented Case
View Patent ↗
Granted: Mar 8, 1988
Filed: Jan 16, 1986
Inventors
John A. Matalis
Thomas Watmough
Assignee (at issue)
J. I. Case Company
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.