Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Norman W. Gavin0
Date of Patent
June 24, 2008
0Patent Application Number
106900950
Date Filed
October 21, 2003
0Patent Primary Examiner
Patent abstract
A septic system tank vertical wall has vertically overlapping grooved rings having specific diameters for receiving existing sealing couplers for septic system pipe. One wall of the groove has portions at different angles from the wall. The grooves are at the same depth and discontinuous at their intersections.
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