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KEYSPAN CORP
US4 patents
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US6138501AOct 31, 2000
Plunger bar
KEYSPAN CORP18 citations82
US7021328B2Apr 4, 2006
No interrupt service tee and method
KEYSPAN CORP12 citations77
US6612330B1Sep 2, 2003
No interrupt service tee and method
KEYSPAN CORP10 citations67
US6926024B2Aug 9, 2005
Utility valve box lockout device
KEYSPAN CORP4 citations45