Patent ReferencesElectro-optic identifiction code system in a timepiece Optical card and card reader system for purchase of parking time Nautical moon and tide clock apparatus Patent #: 4993002 InventorApplicationNo. 936037 filed on 08/25/1992US Classes:368/19With tide displayExaminersPrimary: Roskoski, BernardAttorney, Agent or FirmInternational ClassG04B 019/26AbstractA graphic tide indicator system in which time intervals between a plurality of corrective tides are stored, the temporal position in the current time interval is determined, and a visual display is employed to display the relative water depth. | |