The Wizard 210 product: U.S. Patent No. 7,159,587, U.S. Patent No. 7,487,772; U.S. Patent No. 7,997,267; U.S. Patent No. 7,743,767.
The Wizard 220 product: U.S. Patent No. 7,159,587, U.S. Patent No. 7,487,772; U.S. Patent No. 7,997,267.
The iCH Auto and iCH Prime products: U.S. Patent No. 6,216,691; U.S. Patent No. 6,935,337.
The XT Auto, XT Prime, XT Sense and XT Fit products: U.S. Patent No. 6,216,691.
The XT Heated Humidifier products:  U.S. Patent No. RE44,453