http://www.freshpatents.com/Railways-dtnewntc104.php USPTO Class 104 - Railways en-us Thu, 18 Dec 2008 23:57:42 -0800 1000 Wednesday Thursday Friday Saturday Sunday 141 31 http://www.freshpatents.com/index.php?rss=true http://www.freshpatents.com/images/freshpatentsnav_rss.gif http://www.freshpatents.com/Method-for-replacing-old-ties-of-a-railroad-track-with-new-ties-dt20081211ptan20080302265.php Thu, 18 Dec 2008 23:57:42 -0800 The invention relates to the replacement of old ties of a railway track by new ties. This aim can be achieved by spreading the two rails apart from each other. The reception of ballast gravel for producing a recess of ballast is carried out in a region below of the...