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Karl Marx
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| Number | Title | Issue Date |
| 7014171 | Tie lifter and holder An improved design that would allow one workman to easily elevate a heavy concrete tie to the base of the rail and hold it in position while tie is connected to the rail with retainer clips. Improvements are made in the handle design that allow the workman to remain... | 03/21/2006 |
| 6260824 | Board saver pry bar A pry bar capable of removing boards while minimizing damage during removal so that the boards may be reused. The pry bar having a handle, a cross bar, and two pairs of pry arms with each pair having a different length. The handle forms an acute angle wit... | 07/17/2001 |
| 6230417 | Level crossing adjusting device The gauge and cess panels (3, 4) of a level crossing creep apart lengthwise of the track (1, 2) and need closing up again from time to time. A device (5, 24) for this consists of a member (8, 26) that engages under or over a rail (1) and has a portion (10... | 05/15/2001 |