Horology: time measuring systems or devices – Plural timepiece system or system device – With wireless synchronization
Patent
1991-09-09
1993-11-02
Ng, Jin F.
Horology: time measuring systems or devices
Plural timepiece system or system device
With wireless synchronization
379 59, 4551811, G04C 1102, H04M 1100, H04B 118
Patent
active
052589641
ABSTRACT:
A cellular mobile station is operable in a telephone mode and a time data display mode. During the time display mode, the station constantly receives an area identifying code transmitted from a cellular mobile communications system. On crossing a boundary between adjoining cell-site areas, a time difference value is entered from a keypad into a location of a memory corresponding to the received code. This process is continued on a learning basis to store as many time difference values into the memory as there are cell-site areas along the route of a journey. Following the learning process, the station constantly receives an area identifying code and recalls one of the stored time difference data from the memory corresponding to a code received on crossing a boundary and modifies displayed timepiece data with the recalled time difference.
REFERENCES:
patent: 4204398 (1980-05-01), Lemelson
patent: 4315332 (1982-02-01), Sakami et al.
Motorola, Incorporation, "DYNA T.A.C. Cellular Mobile Telephone General Description" Jun. 15, 1983.
Iguchi Kazuaki
Koma Noriko
Cumming William D.
NEC Corporation
Ng Jin F.
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