Granted Patent
Utility
US 4,051,983 · App. 05/633,315
Pump sprayer
Inventor:
Walter F. C. Anderson
Patented Case
View Patent ↗
Granted: Oct 4, 1977
Filed: Nov 19, 1975
Inventor
Walter F. C. Anderson
Assignee (at issue)
Diamond International 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.