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Northern Illinois Gas Co

Northern I
Active Patents
0
Total Holdings
3

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US3967202A Data transmission system including an RF transponder for ge… Expired / Lapsed 1974-07-25 1976-06-29 29 Details
US3786423A Apparatus for cumulatively storing and remotely reading a m… Expired / Lapsed 1972-01-24 1974-01-15 19 Details
US3705385A Remote meter reading system Expired / Lapsed 1969-12-10 1972-12-05 61 Details