Tide clock
Patent 5050139 Issued on September 17, 1991. Estimated Expiration Date: 
March 13, 2011. 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.
March 13, 2011. 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 3745313 Tide and time calculating device Tide timer Tide clock device Patent #: 4849949 InventorApplicationNo. 668486 filed on 03/13/1991US Classes:368/19With tide displayExaminersPrimary: Miska, Vit W.Attorney, Agent or FirmInternational ClassG04B 019/26AbstractA tide clock employs a tide dial and a solar time dial which are rotatably driven at different uniform rates by a timepiece. The time of the next high or low tide is indicated by alignment of selected indicia on the dials. A graphical indication of the current status of the tidal stage is also continuously represented on the clock. The clock may also be employed to readily determine the approximate time of the high tide for up to fourteen succeeding days. | |
