04992947 is referenced by 120 patents and cites 6 patents.

A vehicular navigation apparatus, which is equipped with a help function, for outputting guidance information for travel to a desired destination includes an input unit having desired destination input means, present position input means and help function input means, a memory unit for storing desired destination information, and a display unit for outputting the guidance information in response to input information from the input unit, wherein the memory unit is provided with a non-volatile RAM, with necessary information being saved in an area of the non-volatile RAM when a help function is called by the help function input means. Help function items are provided for the following occasions: when the driver wishes to input or change a departure point and then depart from that point; when the driver wishes to change a desired destination while en route to a formerly set destination; when the driver strays off course while en route to a desired destination and cannot determine his present position without returning to the point at which the vehicle went off course; when a course cannot be travelled because of road construction or the like; when traffic becomes heavy and the driver wishes to change from one route to another to avoid congestion, and when the driver wishes to temporarily leave the course and then return to the course at the same point.

Title
Vehicular navigation apparatus with help function
Application Number
7/290118
Publication Number
4992947
Application Date
December 27, 1988
Publication Date
February 12, 1991
Inventor
Shuzo Moroto
Anjo
JP
Koji Sumiya
Anjo
JP
Shoji Yokoyama
Anjo
JP
Mitsuhiro Nimura
Anjo
JP
Agent
Varndell Legal Group
Assignee
Kabushiki Kaisha Shinsangyokaihatsu
JP
Aisin Aw
JP
IPC
G06F 15/50
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