子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 121 | Time and cost calculator | US1500642D | US1500642A | 1924-07-08 | ||
| 122 | Calculating machine | US1415297D | US1415297A | 1922-05-09 | ||
| 123 | Bation | US1413021D | US1413021A | 1922-04-18 | ||
| 124 | Calculating-machine. | US12477716 | 1916-10-10 | US1251180A | 1917-12-25 | CANTRELL FRANK J |
| 125 | Arithmetical calculator. | US1914869480 | 1914-10-30 | US1222731A | 1917-04-17 | BURNETT MICHAEL G |
| 126 | Date-calculating device. | US1911663658 | 1911-12-04 | US1123754A | 1915-01-05 | KERR DAVID SMITH |
| 127 | Adding-machine. | US1913786293 | 1913-08-23 | US1109378A | 1914-09-01 | WARD JOHN D; WARD LILLIAN H |
| 128 | Educational appliance. | US1912716857 | 1912-08-24 | US1093690A | 1914-04-21 | FREEMAN LABAN TAYLOR |
| 129 | Time and wage computer. | US1908426473 | 1908-04-11 | US1088889A | 1914-03-03 | FALVEY THOMAS J; CALDWELL ROBSON D |
| 130 | Calculating apparatus. | US1911646460 | 1911-08-28 | US1039455A | 1912-09-24 | SLEIGHT WILLIAM H |
| 131 | Interest-calculating device. | US1910559430 | 1910-05-05 | US1039373A | 1912-09-24 | FITZGERALD JAMES J |
| 132 | Computing-machine. | US1911667430 | 1911-12-23 | US1033787A | 1912-07-30 | DAVISON ANDREW O |
| 133 | Calculating apparatus. | US1911651834 | 1911-09-28 | US1032322A | 1912-07-09 | BLY ALBERT B |
| 134 | Time-calculating machine. | US1910547309 | 1910-03-04 | US995466A | 1911-06-20 | JONES HOMER K |
| 135 | Register for lumber measurements. | US1909534496 | 1909-12-22 | US984908A | 1911-02-21 | HALEY JOSEPH W; YELTON CHARLES B |
| 136 | Automatic computing device and cash-drawer. | US1910540891 | 1910-01-29 | US978950A | 1910-12-20 | SHERWOOD WALTER |
| 137 | Computing tape-measure. | US1907386961 | 1907-08-03 | US870884A | 1907-11-12 | HOLINGER EMIL F |
| 138 | Calculating-machine. | US1905280289 | 1905-09-27 | US829526A | 1906-08-28 | HINES JAMES |
| 139 | Calculating-machine. | US1903177745 | 1903-10-20 | US823219A | 1906-06-12 | HENSLEY HUBERT A |
| 140 | Tabular-sheet holder. | US1904202120 | 1904-04-07 | US784272A | 1905-03-07 | NAGLE AUGUSTUS F |
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