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The system was tested by TUV and test institutes on behalf of the insurance industry and found to be safe for use.[1] WASA was registered with the patent office in 1980, with BSH receiving the patent two years later.[2]
Bosch's Aqua Stop logo. (Source:BSH Corporate Archives)
- ↑ Stickel: Spülchronik, page 114.
- ↑ Stickel: Spülchronik, page 115.