Horology: time measuring systems or devices – Plural timepiece system or system device – With wireless synchronization
Reexamination Certificate
2008-03-21
2009-06-23
Luebke, Renee (Department: 2833)
Horology: time measuring systems or devices
Plural timepiece system or system device
With wireless synchronization
C375S354000
Reexamination Certificate
active
07551521
ABSTRACT:
A time information receiver and radio controlled watch that receives a time code in which different data pulses are disposed one in a unit period. A composite signal waveform of a plurality of detected signals of the time code shifted sequentially by a unit period of 1 second is obtained by sample adders. A start point of each unit period is detected from the composite signal waveform as a seconds synchronization point where the receiver and watch is seconds-synchronized with the time code. An accurate seconds synchronization point is detected from the detected signal even when the same includes a considerable noise.
REFERENCES:
patent: 2003/0117901 (2003-06-01), Takada et al.
patent: 2005/0094495 (2005-05-01), Takada et al.
patent: 2006/0067166 (2006-03-01), Murata et al.
patent: 11-211858 (1999-08-01), None
patent: 2005-249632 (2005-09-01), None
Related U.S. Appl. No. 12/077,860, filed Mar. 21, 2008; Inventor: Kaoru Someya; Title: Time Information Receiver and Radio Controlled Watch.
Casio Computer Co. Ltd.
Collins Jason
Frishauf Holtz Goodman & Chick P.C.
Luebke Renee
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