The Patent Trial and Appeal Board found that Kohler Co. showed that challenged claims of Delta Faucet Co.'s patent directed to an illumination device for a spray head or a pendant showerhead are unpatentable as obvious over prior art. The board said that the challenged claims are obvious over various combinations of prior art, including prior art that discloses a pull-out faucet including a spray head mounted on a bod, a shower head, and a plumbing fixture disposed below the water line of a swimming pool.
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