| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 241 | Railway-switch throw. | US10824116 | 1916-07-08 | US1233378A | 1917-07-17 | LOEFFLER ADOLF |
| 242 | Trolley-contactor. | US1914874213 | 1914-11-27 | US1231413A | 1917-06-26 | MURRELL CLIFFORD H |
| 243 | Trolley-switch. | US8606916 | 1916-03-23 | US1217317A | 1917-02-27 | KULICKE FREDERICK W |
| 244 | Trolley-switch. | US9943816 | 1916-05-23 | US1208048A | 1916-12-12 | THOMPSON JAMES C |
| 245 | Trolley-operated contact. | US1912693912 | 1912-04-29 | US1176767A | 1916-03-28 | MCELROY JAMES F; MCELROY SUSIE H |
| 246 | Electric railway-switch. | US1914877764 | 1914-12-17 | US1129097A | 1915-02-23 | HYLER GEORGE; HERBISON BEAUFORD |
| 247 | Signaling device. | US1913788426 | 1913-09-06 | US1103860A | 1914-07-14 | BARRETT GEORGE L |
| 248 | Electric railway-signal. | US1910579758 | 1910-08-30 | US1090309A | 1914-03-17 | HOWELL JOHN B |
| 249 | Electrically-controlled railway-switch. | US1913756142 | 1913-03-22 | US1079991A | 1913-12-02 | OLMSTED ELMER S |
| 250 | Controlling-cam. | US1912679917 | 1912-02-26 | US1075799A | 1913-10-14 | WALKER CASSIUS M |
| 251 | Make-and-break mechanism. | US1911636239 | 1911-06-30 | US1074071A | 1913-09-23 | TEPEL HERMAN A |
| 252 | Electric signal device. | US1046634D | US1046634A | 1912-12-10 | PARRISH HOMER A | |
| 253 | Electric track-switch. | US1910541176 | 1910-01-31 | US989730A | 1911-04-18 | TIERNEY JOSEPH PATRICK; MALONE JOHN |
| 254 | Electric-switch-operating means. | US1910571455 | 1910-07-11 | US981683A | 1911-01-17 | PINCKNEY THEOPHILUS |
| 255 | Switch-operating mechanism. | US978053D | US978053A | 1910-12-06 | OLMSTED ELMER S | |
| 256 | Switch-operating mechanism for railways. | US1908448747 | 1908-08-15 | US936381A | 1909-10-12 | SQUIRES CHARLES WM |
| 257 | Electric switching device for railways. | US1907380669 | 1907-06-25 | US917541A | 1909-04-06 | CHEATHAM ROBERT V |
| 258 | Trolley-switch. | US1908435503 | 1908-05-28 | US915700A | 1909-03-16 | RUDDICK JOHN J |
| 259 | Automatic switch for trolley-lines. | US1907390757 | 1907-08-30 | US887504A | 1908-05-12 | NELSON JOSEPH |
| 260 | Electric switch. | US1904226782 | 1904-10-01 | US885345A | 1908-04-21 | HUGHES BENJAMIN; YOUNG HERBERT NOEL |
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