Assignee
ASF KEYSTONE INC
US19 patents
Top patents by PatentIndex Score
US6672224B2Jan 6, 2004
Railway car truck with a rocker seat
ASF KEYSTONE INC91 citations96
US6691625B2Feb 17, 2004
Friction wedge for a railroad car truck having a replaceable wear member
ASF KEYSTONE INC72 citations95
US7308855B2Dec 18, 2007
Railway truck pedestal bearing adapter
ASF KEYSTONE INC38 citations92
US6279765B1Aug 28, 2001
Railcar cushioning device with internal spring
ASF KEYSTONE INC20 citations90
US6199708B1Mar 13, 2001
Railcar cushioning device with internal elastomeric spring
ASF KEYSTONE INC33 citations90
US7174837B2Feb 13, 2007
Three-piece motion control truck system
ASF KEYSTONE INC37 citations89
US7387074B2Jun 17, 2008
Railway truck bearing adapter
ASF KEYSTONE INC47 citations88
US7121212B2Oct 17, 2006
Ride control constant contact side bearing arrangement
ASF KEYSTONE INC34 citations86
US6357612B1Mar 19, 2002
Rail car cushioning device and method for positioning same
ASF KEYSTONE INC21 citations86
US7389731B2Jun 24, 2008
Non-metallic insert for rail car bolster wedge
ASF KEYSTONE INC10 citations83
US7353759B2Apr 8, 2008
Sideframe with adapters to connect surface brackets
ASF KEYSTONE INC10 citations83
US6644214B1Nov 11, 2003
Constant contact side bearing
ASF KEYSTONE INC20 citations83
US7527003B1May 5, 2009
Railroad freight car sidebearing
ASF KEYSTONE INC18 citations82
US7263930B2Sep 4, 2007
Railway truck suspension design
ASF KEYSTONE INC17 citations82
US6286437B1Sep 11, 2001
Railway car outlet gate assembly
ASF KEYSTONE INC17 citations82
US7469641B2Dec 30, 2008
Bolster and spring pockets for use with rail truck
ASF KEYSTONE INC13 citations81
US7017498B2Mar 28, 2006
Multi-purpose universal sideframe for railway trucks
ASF KEYSTONE INC18 citations80
US6986432B2Jan 17, 2006
Common cast draft sill for type E and F draft gear
ASF KEYSTONE INC8 citations65
US7069864B2Jul 4, 2006
Railway freight car end sill transition member
ASF KEYSTONE INC4 citations62