A bathtub water level monitoring system for alerting a user upon acquisition of a pre-selected water level in a bathtub. The bathtub water level monitoring system includes a main unit adapted for attachment to an interior face of a bathtub, the main unit having a plurality of water sensors aligned along...http://www.google.de/patents/US20050088308?utm_source=gb-gplus-sharePatent US20050088308 - Bathtub water level monitoring system
