Patent D604736 Issued on November 24, 2009. Estimated Expiration Date: November 24, 2023. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Patent References
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Keyboard Patent #: 5439304 Issued on: 08/08/1995 Inventor: Phillips, et al.