15 Utility Patents
#14 in Clarksville, MD
#1,469 in Maryland
#123,625 in US
#247,061 in the World
Forward Citations = 502
Company Filing History:

Southern California Gas Company
Columbia Gas System Service Corporation
4. 2 out of 4
New York Gas Group
5. 1 out of 163,870

where one patent can have more than one assignee
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