| 摘要 |
895,252. Subtractors. INTERNATIONAL BUSINESS MACHINES CORPORATION. Sept. 16, 1959 [Sept. 16, 1958], No. 31619/59. Addition to 884,488. Drawings to Specification. Class 106 (1). The adder of the parent Specification is modified for use as a subtractor by complement addition. The apparatus is virtually identical with that of the prior application, the entry switches of the subtrahend being the complements of those used for entering the addend in the prior application. Specification 895,251 also is referred to. |
