Artifact Details Title Asynchronous add-subtract circuit Catalog Number 102634960 Type Document Description Patent diagram. Poor quality text Logic simulator Date [1958] Author Pomerene, James H. Contributor Lester, E. Extent 1 p. Copyright Holder company confidential Category Patent; Design drawing Subject IBM Project Stretch Credit Gift of Harwood G. Kolsky Lot Number X3021.2005 102634960.pdf