US Patent 7389891 Septic system tank
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Patent Inventor Names
Norman W. Gavin0
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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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US Patent 07389891 Septic system tank US Patent 7389891 Septic system tank
Infobox
Patent Number
073898910
Patent Number
73898910
Edits on 26 Sep, 2022
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Patent Jurisdiction
Patent Number
073898910
Date of Patent
June 24, 2008
0Patent Application Number
106900950
Date Filed
October 21, 2003
0Official Website
Patent Primary Examiner
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US Patent 07389891 Septic system tank
Infobox
Is a
Patent jurisdiction
Patent number
07389891
Date of patent
June 24, 2008
Patent application number
10690095
Date Filed
October 21, 2003
Patent primary examiner
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