Horology: time measuring systems or devices – Plural timepiece system or system device – With wireless synchronization
Reexamination Certificate
2003-03-28
2008-09-09
Miska, Vit W (Department: 2833)
Horology: time measuring systems or devices
Plural timepiece system or system device
With wireless synchronization
C368S059000
Reexamination Certificate
active
07423935
ABSTRACT:
A radio wave correction timepiece has an antenna21for receiving external radio information including time information consisting of external time data, a reception circuit22,and a time counter53for producing internal time data. A control circuit24has a comparison circuit54for determining the difference between received external time data and internal time data, and outputting a difference data value. A reception information storage unit71stores at least a plurality of data sets, each consisting of received external time data and its resultant difference data value. A correction calculation unit62calculates an estimated correction value using the plurality of stored data sets, and the elapsed time from the last reception. An internal time correction control unit61corrects the internal time using the estimated correction value.
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Haro Rosalio
Miska Vit W
Seiko Epson Corporation
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