The Patent Trial and Appeal Board said that some challenged claims of Danco Inc.'s patent that discloses a toilet fill valve are unpatentable as obvious over prior art, in an inter partes review by Fluidmaster Inc. The board determined that some claims are obvious over prior art that discloses a water silencing and saving means for ball cock valve assembly in a toilet flush tank, and that discloses a toilet flushing device.
This summary was produced by Bloomberg Law Automation and edited by Bloomberg Law staff.
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