Granted Patent
Utility
US 5,639,027 · App. 08/351,932
Two component external mix spray gun
Inventor:
Alan H. Fritz
Patented Case
View Patent ↗
Granted: Jun 17, 1997
Filed: Dec 8, 1994
Inventor
Alan H. Fritz
Assignee (at issue)
Ransburg 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.