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AIRVAC INC

US3 patents

Top patents by PatentIndex Score

US6397874B1Jun 4, 2002

Dual backflow check valve

AIRVAC INC72 citations85

US5570715ANov 5, 1996

Sump-vented controller mechanism for vacuum sewerage transport system

AIRVAC INC26 citations85

US5515554AMay 14, 1996

Vacuum toilet system

AIRVAC INC18 citations78