File:Usp4480723.png
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Captions
| Description |
English: Marshalling yard retarder, Fig. 1 |
| Date | |
| Source | U.S. Patent No. 4,480,723 |
| Author | Håkan Ingvast and Bo Karlsson |
| Permission (Reusing this file) |
United States Patent |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:17, 18 May 2007 | | 1,800 × 1,200 (124 KB) | Densha Gokko (talk | contribs) | {{Information |Description={{en|Marshalling yard retarder, Fig. 1}} |Source=[http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=4480723 U.S. Patent No. 4,480,723] |Date=1984-11-06 |Author=Håkan Ingvast and Bo Karlsson |Permission=United States Patent |
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