Granted Patent
Utility
US 4,739,503 · App. 06/853,854
Carry/borrow propagate adder/subtractor
Inventors:
John Armer, Erwin J. Wittmann
Patented Case
View Patent ↗
Granted: Apr 19, 1988
Filed: Apr 21, 1986
Inventors
John Armer
Erwin J. Wittmann
Assignee (at issue)
RCA Corporation
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.