Nautical clock apparatus and methods
Patent 5579289 Issued on November 26, 1996. Estimated Expiration Date: 
December 13, 2014. 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.
December 13, 2014. 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 D318810 D319028 3921383 Clockwork for designating time and tide Celestial clock Tide timer Timepiece Astronomical clock Moon phase display clock Clock InventorApplicationNo. 355407 filed on 12/13/1994US Classes:368/19With tide displayExaminersPrimary: Roskoski, BernardAttorney, Agent or FirmForeign Patent References
International ClassG04B 019/26AbstractAn improved nautical clock apparatus of this invention is comprised of a clock base, a tide state indicator attached to the base, and an electronic controller attached to the tide state indicator and to the base for operating the tide state indicator to continuously indicate a time between successive like tide states based on a set time interval therebetween of about 12 hours and 25.235 minutes adjusted such that the time is longer than about 12 hours and 25.235 minutes during at least one portion of each lunar month and shorter than about 12 hours and 25.235 minutes during at least one other portion of each lunar month.Other References
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