The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 15, 1997
Filed:
Nov. 30, 1994
Applicant:
Inventor:
Toshiya Kanesaka, Chiba, JP;
Assignee:
Seiko Instruments Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G04C / ;
U.S. Cl.
CPC ...
368 47 ;
Abstract
A radio wave-corrected timepiece permitting one to easily determine whether radio waves containing correct time data or radio waves containing abnormal time data are being received includes a receiver for receiving a broadcast time signal containing encoded time data and producing a rectangular pulse train containing encoded time data, a memory for storing pulse widths of the encoded data, a comparison circuit for comparing the output signal of the receiver with the output of the memory, and a processor for receiving the output of the comparison circuit, calculating the time, and providing an output permitting correction of a measured time.