Granted Patent
Utility
US 4,303,989 · App. 06/058,408
Digital data sorter external to a computer
Inventors:
Robert J. Membrino, George D. Gilbreath, Jr.
Patented Case
View Patent ↗
Granted: Dec 1, 1981
Filed: Jul 17, 1979
Inventors
Robert J. Membrino
George D. Gilbreath, Jr.
Assignee (at issue)
The Singer Company Limited
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.