Granted Patent
Utility
US 4,304,321 · App. 06/008,709
Thermally responsive actuator device particularly for automotive fan clutch
Inventor:
Backman Wong
Patented Case
View Patent ↗
Granted: Dec 8, 1981
Filed: Feb 1, 1979
Inventor
Backman Wong
Assignee (at issue)
Standard-Thomson 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.