Movement and electronic timepiece

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9971310
SERIAL NO

15237868

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Abstract

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A timepiece movement includes a center wheel & pinion that drives a minute hand, a second wheel & pinion arranged coaxially with a center axle of the center wheel & pinion, a first light emitting element arranged on one side in an axial direction of the center axle with respect to the center wheel & pinion and the second wheel & pinion, and a first light receiving element arranged on the other side in the axial direction of the center axle across the second wheel & pinion, and that detects light emitted from the first light emitting element. The center wheel & pinion has a first center wheel transmittable portion through which the light emitted from the first light emitting element is transmittable, and a second center wheel transmittable portion which is disposed on a rotation trajectory of the first center wheel transmittable portion and through which the light emitted from the first light emitting element is transmittable. The second wheel & pinion has a first second wheel transmittable portion which is disposed on the rotation trajectory of the first center wheel transmittable portion and the second center wheel transmittable portion when viewed in the axial direction of the center axle and through which the light emitted from the first light emitting element is transmittable.

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Patent Owner(s)

Patent OwnerAddress
SEIKO WATCH CORPORATION5-11 GINZA 4-CHOME CHUO-KU TOKYO

International Classification(s)

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  • 2016 Application Filing Year
  • G04B Class
  • 310 Applications Filed
  • 246 Patents Issued To-Date
  • 79.36 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances2016201720182019202020212022202320240255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ihashi, Tomohiro Chiba, JP 52 129
Mugishima, Katsuya Chiba, JP 12 3
Ogasawara, Kenji Chiba, JP 141 843
Sakai, Satoshi Chiba, JP 163 1884

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Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges6613991201 - 1011 - 2021 - 3031 - 400102030405060708090100110120130140150

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