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I've removed the following. The claim shows up a number of times in Hoffman's own publications and quotes, but there's no reliable 3rd-party support for any such invention:
Prior to entering the tea world, Hoffman invented a unique sonic cleaning system for the cleaning of precious ancient textiles, fine art, and artifacts, and had several important clients including New York's Metropolitan Museum, the Textile Museum in Washington DC, the Asian Art Museum, San Francisco, and the Smithsonian.
