Granted Patent
Utility
US 4,173,418 · App. 05/920,457
Apparatus for mixing liquids
Inventor:
William D. Vork
Patented Case
View Patent ↗
Granted: Nov 6, 1979
Filed: Jun 29, 1978
Inventor
William D. Vork
Assignee (at issue)
GRACO INC.
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.