| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 61 | Fluid-operated tool | US47875830 | 1930-08-29 | US1855364A | 1932-04-26 | RICHARDSON LED L |
| 62 | Auger drill | US17532027 | 1927-03-14 | US1800344A | 1931-04-14 | GUSTAFSON HJALMER C |
| 63 | Rotation mechanism for rock drills | US36934629 | 1929-06-08 | US1773366A | 1930-08-19 | LEAR EARL B |
| 64 | Rock drill | US3853221 | 1921-01-19 | US1740684A | 1929-12-24 | GARTIN ELMER G |
| 65 | Rotating drill chuck for percussive tools | US75023624 | 1924-11-17 | US1716114A | 1929-06-04 | CHAPMAN GEORGE T |
| 66 | Rotating mechanism for rock drills | US34901820 | 1920-01-02 | US1574879A | 1926-03-02 | GARTIN ELMER G |
| 67 | Rock-drilling engine | US43451521 | 1921-01-03 | US1517512A | 1924-12-02 | HULQUIST CHARLES A |
| 68 | Rotating mechanism for percussive tools | US34641419 | 1919-12-20 | US1474338A | 1923-11-13 | GARTIN ELMER G |
| 69 | Sheet | US1326245D | US1326245A | 1919-12-30 | ||
| 70 | clark | US1314246D | US1314246A | 1919-08-26 | ||
| 71 | Drilling-machine. | US1912707714 | 1912-07-05 | US1252374A | 1918-01-01 | GILMAN GEORGE H |
| 72 | Hammer-drill. | US1156115 | 1915-03-02 | US1242882A | 1917-10-09 | GILMAN GEORGE H |
| 73 | Daniel s | US1196052D | US1196052A | 1916-08-29 | ||
| 74 | Hammer-drill. | US1909479324 | 1909-02-23 | US1084270A | 1914-01-13 | HANSEN CHARLES C |
| 75 | Drill-rotating mechanism. | US1913749758 | 1913-02-20 | US1081351A | 1913-12-16 | WAUGH DANIEL S |
| 76 | Pneumatic feeding device for stoping-drills. | US1911656267 | 1911-10-23 | US1065059A | 1913-06-17 | LEYNER JOHN GEORGE |
| 77 | Gas-operated rock-drilling engine. | US1908416110 | 1908-02-15 | US896777A | 1908-08-25 | TROTT ROLLAND S |
| 78 | Rock-drill-feeding mechanism. | US1906315978 | 1906-05-09 | US843718A | 1907-02-12 | TURNER THOMAS |
| 79 | Rock-drill. | US1905261294 | 1905-05-20 | US823059A | 1906-06-12 | LEICHTER EDWARD |
| 80 | Impact-tool. | US1902128108 | 1902-10-21 | US739440A | 1903-09-22 | OLDHAM SAMUEL |
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