Granted Patent
Utility
US 4,022,351 · App. 05/564,700
Foam dispenser
Inventor:
Hershel Earl Wright
Patented Case
View Patent ↗
Granted: May 10, 1977
Filed: Apr 3, 1975
Inventor
Hershel Earl Wright
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.