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 | hansel | US619406D | US619406A | 1899-02-14 | ||
| 122 | Geoege l | US556072D | US556072A | 1896-03-10 | ||
| 123 | thomas | US539154D | US539154A | 1895-05-14 | ||
| 124 | Kail way block signal look and register | US537757D | US537757A | 1895-04-16 | ||
| 125 | And george m | US530763D | US530763A | 1894-12-11 | ||
| 126 | -pfeil | US501100D | US501100A | 1893-07-11 | ||
| 127 | frisohen | US501062D | US501062A | 1893-07-11 | ||
| 128 | System for electric circuits | US435105D | US435105A | 1890-08-26 | ||
| 129 | Frederick stitzel | US428970D | US428970A | 1890-05-27 | ||
| 130 | Railway signal apparatus | US266297D | US266297A | 1882-10-24 | ||
| 131 | Improvement in railway signals | US122202D | US122202A | 1871-12-26 | ||
| 132 | Tram coordinating method and apparatus | US758387 | 1996-11-29 | US5676059A | 1997-10-14 | John Darby Alt |
| A method and apparatus for coordinating the movement of a plurality of oppositely directed trams operating generally simultaneously along a single, dedicated lane, including a plurality of stop-boarding areas, a plurality of corresponding by-pass lanes, sensors along the lane to sense the location of the trams, a central processor to compare the location of the trams and calculate signals to pairs of oppositely moving trams such that they will adjust their speeds to arrive at a common stop-boarding area at substantially the same time. | ||||||
| 133 | Vehicle traffic control system | US28512963 | 1963-06-03 | US3286091A | 1966-11-15 | FERM GLENN O; DAVISON GORDON W |
| 134 | Railway signaling system with automatic meets between trains | US63027356 | 1956-12-24 | US2916612A | 1959-12-08 | MARPLE THOMAS P |
| 135 | Railway traffic controlling apparatus | US31484352 | 1952-10-15 | US2819388A | 1958-01-07 | PELIKAN JOHN M |
| 136 | Railway traffic controlling apparatus | US25048451 | 1951-10-09 | US2721932A | 1955-10-25 | BABCOCK JOEL R; CADMAN IRA F |
| 137 | Coded track circuit signaling system | US11466149 | 1949-09-08 | US2703839A | 1955-03-08 | JUDGE THOMAS J |
| 138 | Centralized traffic controlling system for railroads having track obstruction detecting means | US65562246 | 1946-03-19 | US2635182A | 1953-04-14 | JUDGE THOMAS J |
| 139 | Railway signal control system for single track railways | US3107048 | 1948-06-04 | US2618740A | 1952-11-18 | GROSJEAN WILBUR V |
| 140 | Railway signal control system | US77065047 | 1947-08-26 | US2564778A | 1951-08-21 | CLAUS WILLIAM H |
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