Assignee
NORTHERN ILLINOIS GAS
US·3 granted patents·159 citations·filing 1978–1992
Top patents by PatentIndex Score
3 records- 0196US4189925AMethod of storing electric powerNORTHERN ILLINOIS GAS·Filed 1978·Granted Feb 26, 1980·132 cites·9 claims
- 0260US4166380AQuantitative measuring system for combustible gas with audible tick rateNORTHERN ILLINOIS GAS·Filed 1978·Granted Sep 4, 1979·16 cites·7 claims
- 0338US5321233AElectrofusion fitting and sealing method for distribution lineNORTHERN ILLINOIS GAS·Filed 1992·Granted Jun 14, 1994·11 cites·21 claims
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