Granted Patent
Utility
US 4,274,558 · App. 05/922,270
Dispensing of fluent materials
Inventor:
Anthony R. Clausen
Patented Case
View Patent ↗
Granted: Jun 23, 1981
Filed: Jul 6, 1978
Inventor
Anthony R. Clausen
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.