Granted Patent
Utility
US 6,004,117 · App. 09/315,185
Displacement pump
Inventor:
Donald H. Brunk
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: May 20, 1999
Inventor
Donald H. Brunk
Assignee (at issue)
Qualicon
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.