Serge L. Proulx

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St-Redempteur-de-Vaudreuil, CA

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Patents Grantslast 30 patents

Information Patent Grant
Drainage valve having a flexible flap with an edge taper
- Patent number 5,020,567
- Issue date Jun 4, 1991
- Innotag Inc.
- Serge L. Proulx
- E03 - WATER SUPPLY SEWERAGE