Granted Patent
Utility
US 4,320,294 · App. 06/217,395
Control device and method of making the same
Inventor:
Charles J. Everett
Patented Case
View Patent ↗
Granted: Mar 16, 1982
Filed: Dec 17, 1980
Inventor
Charles J. Everett
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE LIMITED
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.