File:Railway car retarder.png
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DescriptionRailway car retarder.png |
English: Operable skate type of railway car retarder, Fig. 2 |
Date | |
Source | U.S. Patent No. 3,827,533 |
Author | Peter M. Noble |
Permission (Reusing this file) |
United States Patent |
Public domainPublic domainfalsefalse |
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current | 10:15, 18 May 2007 | 2,800 × 1,800 (574 KB) | Densha Gokko (talk | contribs) | {{Information |Description={{en|Operable skate type of railway car retarder, Fig. 2}} |Source=[http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=3827533 U.S. Patent No. 3,827,533] |Date=1974-08-06 |Author=Peter M. Noble |Permission=United States Pate |
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