Granted Patent
Utility
US 4,405,292 · App. 06/319,716
Pneumatically controlled rate pump
Inventors:
Willard W. Bixby, Jr., Jerry P. Christopher
Patented Case
View Patent ↗
Granted: Sep 20, 1983
Filed: Nov 9, 1981
Inventors
Willard W. Bixby, Jr.
Jerry P. Christopher
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.