Granted Patent
Utility
US 4,614,481 · App. 06/742,900
Pump with replaceable cartridge
Inventor:
John A. Vanderjagt
Patented Case
View Patent ↗
Granted: Sep 30, 1986
Filed: Jun 10, 1985
Inventor
John A. Vanderjagt
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.