Granted Patent
Utility
US 5,411,181 · App. 08/128,768
Variable restrictor for a manually actuated pump
Inventor:
Michael G. Knickerbocker
Patented Case
View Patent ↗
Granted: May 2, 1995
Filed: Sep 17, 1993
Inventor
Michael G. Knickerbocker
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.