Granted Patent
Utility
US 5,560,520 · App. 08/512,226
Precompression pump sprayer
Inventor:
R. Pat Grogen
Patented Case
View Patent ↗
Granted: Oct 1, 1996
Filed: Aug 7, 1995
Inventor
R. Pat Grogen
Assignee (at issue)
Calmar Holdings LLC
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.