| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 261 | Polish-rod clamp | US5294025 | 1925-08-27 | US1664709A | 1928-04-03 | THOMAS SEVERNS; HALL RALPH R |
| 262 | Clamp | US74127124 | 1924-10-02 | US1630863A | 1927-05-31 | PURTLE ALBERT D |
| 263 | Rod clamp | US3626826 | 1926-02-05 | US1606615A | 1926-11-09 | HERBERT DUNHAM |
| 264 | Combined packing gland and clamp for polish rods | US10944526 | 1926-05-15 | US1597071A | 1926-08-24 | HARDY EUBANKS THOMAS |
| 265 | Grip | US950825 | 1925-02-16 | US1562053A | 1925-11-17 | RATIGAN JAMES P |
| 266 | Clamp | US69559724 | 1924-02-27 | US1550496A | 1925-08-18 | BOUGHNER GEORGE K |
| 267 | Oil-well tool | US54063322 | 1922-03-02 | US1548866A | 1925-08-11 | STEVE BULLUM |
| 268 | Cable clamp | US67828223 | 1923-12-03 | US1510921A | 1924-10-07 | BUTLER CHARLES A |
| 269 | Cable clamp for well-drilling rigs | US60699222 | 1922-12-14 | US1467666A | 1923-09-11 | ZUCK ORAL C |
| 270 | Lifter | US55470122 | 1922-04-18 | US1460320A | 1923-06-26 | THEODORE FREY |
| 271 | Clamp | US42202820 | 1920-11-05 | US1400491A | 1921-12-13 | MECHLING FIDELIS M |
| 272 | Clamp | US46473221 | 1921-04-26 | US1396353A | 1921-11-08 | STEVE BULLUM |
| 273 | Pipe-clamp | US42607220 | 1920-11-23 | US1381217A | 1921-06-14 | MCCLELLAN NEELY JOHN |
| 274 | Clamp | US30740619 | 1919-06-28 | US1342141A | 1920-06-01 | WIGLE WILSON B |
| 275 | Wire-line clamp | US1308924D | US1308924A | 1919-07-08 | ||
| 276 | Wire-rope clamp. | US16487217 | 1917-04-27 | US1251723A | 1918-01-01 | WRIGHT CLYDE S |
| 277 | Cable-pulling clamp. | US15644617 | 1917-03-21 | US1244043A | 1917-10-23 | EULER WILLIAM G B |
| 278 | Temper-screw clamp. | US15291317 | 1917-03-06 | US1243065A | 1917-10-16 | HOVIS PARK S |
| 279 | Clamp for well-drilling cables. | US76715 | 1915-01-06 | US1169849A | 1916-02-01 | MAPES CLARENCE T; YANDA FERDINAND C |
| 280 | Rope-clamp. | US1912738669 | 1912-12-26 | US1083478A | 1914-01-06 | ARBON PAUL |
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