Granted Patent
Utility
US 4,223,807 · App. 06/010,294
Multiple product gasoline dispenser
Inventors:
Richard L. Caswell, John A. Todd
Patented Case
View Patent ↗
Granted: Sep 23, 1980
Filed: Feb 8, 1979
Inventors
Richard L. Caswell
John A. Todd
Assignee (at issue)
Dresser Industries, 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.