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US Patent 5050139 - Tide clock
US Patent Issued on September 17, 1991
Estimated Patent Expiration Date:
March 13, 2011Estimated 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.
Estimated Patent Expiration Date:
March 13, 2011Estimated 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.AbstractA 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. | InventorApplicationNo. 668486 filed on 03/13/1991US Classes:368/19With tide displayField of Search368/14, Navigational instrument368/19, With tide display235/88R, Disk235/88NNavigationExaminersPrimary: Miska, Vit W.Attorney, Agent or FirmUS Patent References3745313, 4035617, Tide and time calculating deviceIssued on: 07/12/1977 Inventor: Banner4623259, Tide timer Issued on: 11/18/1986 Inventor: Oberst4849949Tide clock device Issued on: 07/18/1989 Inventor: Voth International ClassG04B 019/26 |
