Inventor
GUETTOUCHE ALI
DE3 patents
Patents
3 patentsUS4572523AFeb 25, 1986
Sealing joint and retaining ring for pipe grooved bell and straight spigot joint
WAVIN BV67 citations92
US6684910B2Feb 3, 2004
Multi-layered pipe
WAVIN BV11 citations64
US4957793ASep 18, 1990
Waste pipe system comprising plastic pipe parts made of thermoplastic material with sound-proofing properties
WAVIN BV5 citations52