Colorado-based Dentist, Dr. Stephen J. Smith, has filed a patent infringement lawsuit in the U.S. District Court for the District of Colorado against Ethicon, a Johnson & Johnson subsidiary, alleging infringement of the U.S. Patent No. 6,482,431 (the ‘431 patent). Dr. Smith also asserted claims for quantum meruit, unjust enrichment, breach of contract and promissory estoppel. The complaint was filed on November 27, 2006.
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