Assignee
COLUMBIA GAS DISTRIBUTION COMP
US·3 granted patents·20 citations·filing 1997–1998
Technology mixE21B3
Top patents by PatentIndex Score
3 records- 0136US5816342ASmall diameter impact boring toolCOLUMBIA GAS DISTRIBUTION COMP·Filed 1997·Granted Oct 6, 1998·13 cites·5 claims
- 0227US5918687ASmall diameter impact boring toolCOLUMBIA GAS DISTRIBUTION COMP·Filed 1998·Granted Jul 6, 1999·5 cites·12 claims
- 0324US5934386ASmall diameter impact boring tool impact headCOLUMBIA GAS DISTRIBUTION COMP·Filed 1998·Granted Aug 10, 1999·2 cites·4 claims
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