Granted Patent
Utility
US 4,441,862 · App. 06/328,072
Synchronized mixing pump
Inventor:
Benjamin Moses Vogel
Patented Case
View Patent ↗
Granted: Apr 10, 1984
Filed: Dec 7, 1981
Inventor
Benjamin Moses Vogel
Assignee (at issue)
Haskel, 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.