Assignee
ASF KEYSTONE INC
US·19 granted patents·1 pending application·528 citations·filing 1997–2008
Top patents by PatentIndex Score
20 records- 0194US6672224B2Railway car truck with a rocker seatASF KEYSTONE INC·Filed 2002·Granted Jan 6, 2004·91 cites·8 claims
- 0293US6691625B2Friction wedge for a railroad car truck having a replaceable wear memberASF KEYSTONE INC·Filed 2002·Granted Feb 17, 2004·72 cites·3 claims
- 0389US7527003B1Railroad freight car sidebearingASF KEYSTONE INC·Filed 2008·Granted May 5, 2009·18 cites·22 claims
- 0489US7387074B2Railway truck bearing adapterASF KEYSTONE INC·Filed 2005·Granted Jun 17, 2008·47 cites·15 claims
- 0588US7308855B2Railway truck pedestal bearing adapterASF KEYSTONE INC·Filed 2004·Granted Dec 18, 2007·38 cites·30 claims
- 0688US7174837B2Three-piece motion control truck systemASF KEYSTONE INC·Filed 2004·Granted Feb 13, 2007·37 cites·22 claims
- 0783US7121212B2Ride control constant contact side bearing arrangementASF KEYSTONE INC·Filed 2004·Granted Oct 17, 2006·34 cites·21 claims
- 0881US7389731B2Non-metallic insert for rail car bolster wedgeASF KEYSTONE INC·Filed 2005·Granted Jun 24, 2008·10 cites·6 claims
- 0981US7353759B2Sideframe with adapters to connect surface bracketsASF KEYSTONE INC·Filed 2005·Granted Apr 8, 2008·10 cites·19 claims
- 1080US7469641B2Bolster and spring pockets for use with rail truckASF KEYSTONE INC·Filed 2006·Granted Dec 30, 2008·13 cites·19 claims
- 1176US6644214B1Constant contact side bearingASF KEYSTONE INC·Filed 2002·Granted Nov 11, 2003·20 cites·20 claims
- 1276US6199708B1Railcar cushioning device with internal elastomeric springASF KEYSTONE INC·Filed 1999·Granted Mar 13, 2001·33 cites·14 claims
- 1373US7263930B2Railway truck suspension designASF KEYSTONE INC·Filed 2004·Granted Sep 4, 2007·17 cites·21 claims
- 1473US7017498B2Multi-purpose universal sideframe for railway trucksASF KEYSTONE INC·Filed 2004·Granted Mar 28, 2006·18 cites·18 claims
- 1558US6279765B1Railcar cushioning device with internal springASF KEYSTONE INC·Filed 1998·Granted Aug 28, 2001·20 cites·42 claims
- 1656US6986432B2Common cast draft sill for type E and F draft gearASF KEYSTONE INC·Filed 2004·Granted Jan 17, 2006·8 cites·20 claims
- 1754US7069864B2Railway freight car end sill transition memberASF KEYSTONE INC·Filed 2004·Granted Jul 4, 2006·4 cites·11 claims
- 1854US6357612B1Rail car cushioning device and method for positioning sameASF KEYSTONE INC·Filed 1997·Granted Mar 19, 2002·21 cites·28 claims
- 1953US6286437B1Railway car outlet gate assemblyASF KEYSTONE INC·Filed 1998·Granted Sep 11, 2001·17 cites·24 claims
- 2044US2007169663A1Sideframe pedestalASF KEYSTONE INC·Filed 2006·Application pending·0 cites
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