Assignee
NPC INC
US15 patents
Top patents by PatentIndex Score
US5641256AJun 24, 1997
Anchoring device for a threaded member
NPC INC427 citations98
US5580068ADec 3, 1996
Liquid filled seal
NPC INC68 citations95
US5360241ANov 1, 1994
Universal saddle tee for pipes
NPC INC56 citations95
US5595524AJan 21, 1997
Grinding apparatus and method which supports a workpiece on the surface being ground
NPC INC22 citations92
US5431459AJul 11, 1995
Band with slotted wedge cams
NPC INC48 citations92
US5029907AJul 9, 1991
Band for effecting a seal
NPC INC40 citations92
US4993722AFeb 19, 1991
Apparatus and method for improved pipe to manhole sealing
NPC INC26 citations92
US6866301B2Mar 15, 2005
Expandable band and locking mechanism
NPC INC19 citations89
US6152455ANov 28, 2000
Expandable band and locking mechanism
NPC INC35 citations85
US7243956B2Jul 17, 2007
Expandable band and locking mechanism
NPC INC10 citations81
US6953194B2Oct 11, 2005
Expandable band and locking mechanism
NPC INC13 citations81
US6364373B1Apr 2, 2002
Corrugated pipe adapter and connection system
NPC INC10 citations71
US8052036B2Nov 8, 2011
Tab lead soldering apparatus and tab lead soldering method
NPC INC3 citations57
US8028735B2Oct 4, 2011
Laminating apparatus
NPC INC3 citations57
US7699085B2Apr 20, 2010
Laminating apparatus
NPC INC2 citations57