Granted Patent
Utility
US 4,089,306 · App. 05/694,507
Port insulation for internal combustion engines
Inventor:
Alexander Goloff
Patented Case
View Patent ↗
Granted: May 16, 1978
Filed: Jun 9, 1976
Inventor
Alexander Goloff
Assignee (at issue)
Caterpillar Tractor Co.
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.