| Patents for B61D 23 - Construction of steps for railway vehicles (506) | |
|---|---|
| 02/1980 | |
| 02/19/1980 | US4188889 Retractable running-board, especially for a railway car door |
| 11/1979 | |
| 11/27/1979 | US4175495 Entrance step arrangement for a short distance transport vehicle |
| 06/1979 | |
| 06/12/1979 | CA1056420A1 Power drive for movable step or door |
| 01/1978 | |
| 01/17/1978 | US4068542 Drive arrangement for transport vehicles |
| 05/1977 | |
| 05/10/1977 | US4022337 Hoist mechanism for use in a vehicle such as a bus |
| 05/1976 | |
| 05/18/1976 | US3957284 Movable steps for a transit vehicle |