|
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| US5024381 | 10 mars 1989 | 18 juin 1991 | Stafford Rail Products, Inc. | Active railroad spike and tie plate interconnection therefor |
| US5391029 | 28 juin 1993 | 21 févr. 1995 | W. A. Deutsher Pty. Ltd. | Fastening nail |
| US7153075 | 8 déc. 2003 | 26 déc. 2006 | KAMAX-Werke Rudolf Kellerman GmbH & Co. K.G. | Press fit fastener and method of producing it |
| USD556917 | 3 avr. 2007 | 4 déc. 2007 | M.A. Industries, Inc. | Two sided manhole step |
