| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 41 | Variable course approach computer | US40341564 | 1964-10-12 | US3262640A | 1966-07-26 | JAMESON ROBERT Q |
| 42 | Concrete constituent indicator | US14895461 | 1961-10-31 | US3117721A | 1964-01-14 | VON REVENTLOW-CRIMINI FREDERIC |
| 43 | Calculator | US85036559 | 1959-11-02 | US3045906A | 1962-07-24 | BURG LAWRENCE E |
| 44 | Trigonometric function finding device | US84437059 | 1959-10-05 | US3042301A | 1962-07-03 | SEALE MILTON A |
| 45 | Computer | US10429261 | 1961-04-20 | US3042295A | 1962-07-03 | COATES ROY K; HOWARD CHARLES D |
| 46 | Axis and ellipse computer | US344860 | 1960-01-19 | US3030011A | 1962-04-17 | PETERSON VERNON E |
| 47 | Mathematical instruments | US74473158 | 1958-06-26 | US3021058A | 1962-02-13 | HORTON JOSEPH R |
| 48 | Two-dimension slide rule | US60356356 | 1956-08-13 | US2998916A | 1961-09-05 | FRANKENFIELD ANDREW D |
| 49 | evans | US2908439D | US2908439A | 1959-10-13 | ||
| 50 | Combustion calculator | US29627452 | 1952-06-30 | US2761619A | 1956-09-04 | MARCEL VERON; ANDRE DUMEZ |
| 51 | Carpenter's calculating device | US68011846 | 1946-06-28 | US2485777A | 1949-10-25 | ROGERS JAMES H |
| 52 | Statistical slide rule | US53916744 | 1944-06-07 | US2434306A | 1948-01-13 | WOOD KENNETH R |
| 53 | Endless slide rule | US18586338 | 1938-01-20 | US2177176A | 1939-10-24 | HOWARD GILMORE |
| 54 | Calculating device | US47674421 | 1921-06-11 | US1439246A | 1922-12-19 | RALPH LANDENBERGER |
| 55 | Calculator. | US1317515 | 1915-03-09 | US1161381A | 1915-11-23 | DUFFY CHARLES HUGH |
| 56 | Calculating device. | US1905239431 | 1905-01-03 | US804646A | 1905-11-14 | YOUNG CHARLES MICHAEL |
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