Granted Patent
Utility
US 4,895,301 · App. 07/351,415
Engine coolant system and method of making the same
Inventor:
Billy E. Kennedy
Patented Case
View Patent ↗
Granted: Jan 23, 1990
Filed: May 12, 1989
Inventor
Billy E. Kennedy
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.