Granted Patent
Utility
US 4,347,973 · App. 06/226,800
Internal combustion engine coolant system, thermostat therefor and methods of making the same
Inventor:
Byron L. Jackson
Patented Case
View Patent ↗
Granted: Sep 7, 1982
Filed: Jan 21, 1981
Inventor
Byron L. Jackson
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.