F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
277/5, 277/56, 2
F16L 21/02 (2006.01) E03F 3/04 (2006.01) F16J 15/32 (2006.01) F16L 5/10 (2006.01)
Patent
CA 1241033
382-1259 Abstract of the Disclosure A circular gasket for sealing the opening between the exterior of a sewer pipe and the interior periphery of an opening in a manhole, in which greater sealing pres- sure is provided by using a plurality of longitudinal openings extending entirely around the gasket through the head portion thereof which contacts the sewer pipe. 13,719-CAN
448903
A-Lok Products Corporation
Smart & Biggar
LandOfFree
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