Granted Patent
Utility
US 4,249,323 · App. 05/916,613
Variable wing plow blade and mounting structure therefor
Inventors:
Robert D. Mathis, Gordon Hine
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Jun 19, 1978
Inventors
Robert D. Mathis
Gordon Hine
Assignee (at issue)
De Lorean Manufacturing 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.