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using electro-magnetic coupling between electric power source and pendulum
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CPC
G04C3/027
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Parent Industries
G
PHYSICS
G04
Horology
G04C
ELECTROMECHANICAL CLOCKS OR WATCHES
G04C3/00
Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
Current Industry
G04C3/027
using electro-magnetic coupling between electric power source and pendulum
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Patents Grants
last 30 patents
Information
Patent Grant
Structure of a ultrathin clock
Patent number
5,442,601
Issue date
Aug 15, 1995
Ching-Ti Chen
G04 - HOROLOGY
Information
Patent Grant
Electromagnetic drive circuit
Patent number
4,866,564
Issue date
Sep 12, 1989
Seikosha Co., Ltd.
Hiroshi Aoki
G04 - HOROLOGY
Information
Patent Grant
Electromagnetic driving circuit
Patent number
4,825,332
Issue date
Apr 25, 1989
Hiroshi Aoki
G05 - CONTROLLING REGULATING
Information
Patent Grant
Whole body swingable clock
Patent number
4,468,132
Issue date
Aug 28, 1984
Rhythm Watch Co., Ltd.
Norihiko Nakamura
G04 - HOROLOGY
Information
Patent Grant
Pendulum arrangement for clock movement
Patent number
4,449,831
Issue date
May 22, 1984
Rhythm Watch Co., Ltd.
Masaru Itami
G04 - HOROLOGY
Information
Patent Grant
Pendulum arrangement of pendulum clock
Patent number
4,378,166
Issue date
Mar 29, 1983
Rhythm Watch Company, Ltd.
Masaru Itami
G04 - HOROLOGY
Information
Patent Grant
Mechanically operating pendulum clock with an electronic correcting...
Patent number
4,196,579
Issue date
Apr 8, 1980
Urgos Uhrenfabrik Schwenningen, Haller, Jauch und Pabst GmbH & Co.
Konrad Schaefer
G04 - HOROLOGY
Information
Patent Grant
Pendulum device for battery-powered clockwork mechanism
Patent number
4,043,118
Issue date
Aug 23, 1977
Kienzle Uhrenfabriken GmbH
Albrecht Haag
G04 - HOROLOGY
Information
Patent Grant
Electromechanical clock
Patent number
3,990,226
Issue date
Nov 9, 1976
Kieninger & Obergfell Fabrik fur technische Laufwerke und Apparate
Wolfgang Fehrenbacher
G04 - HOROLOGY
Information
Patent Grant
3798891
Patent number
3,798,891
Issue date
Mar 26, 1974
G04 - HOROLOGY
Information
Patent Grant
3762154
Patent number
3,762,154
Issue date
Oct 2, 1973
G04 - HOROLOGY
Information
Patent Grant
3750386
Patent number
3,750,386
Issue date
Aug 7, 1973
G04 - HOROLOGY
Information
Patent Grant
3605401
Patent number
3,605,401
Issue date
Sep 20, 1971
G04 - HOROLOGY
Information
Patent Grant
3457483
Patent number
3,457,483
Issue date
Jul 22, 1969
G04 - HOROLOGY
Information
Patent Grant
3424960
Patent number
3,424,960
Issue date
Jan 28, 1969
G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information
Patent Grant
3403312
Patent number
3,403,312
Issue date
Sep 24, 1968
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
3360703
Patent number
3,360,703
Issue date
Dec 26, 1967
G04 - HOROLOGY
Information
Patent Grant
3221231
Patent number
3,221,231
Issue date
Nov 30, 1965
G04 - HOROLOGY
Information
Patent Grant
3168690
Patent number
3,168,690
Issue date
Feb 2, 1965
G04 - HOROLOGY
Information
Patent Grant
3128398
Patent number
3,128,398
Issue date
Apr 7, 1964
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
3124730
Patent number
3,124,730
Issue date
Mar 10, 1964
G04 - HOROLOGY
Information
Patent Grant
3118098
Patent number
3,118,098
Issue date
Jan 14, 1964
G04 - HOROLOGY
Information
Patent Grant
3100278
Patent number
3,100,278
Issue date
Aug 6, 1963
G04 - HOROLOGY
Information
Patent Grant
3040225
Patent number
3,040,225
Issue date
Jun 19, 1962
G04 - HOROLOGY
Information
Patent Grant
2974265
Patent number
2,974,265
Issue date
Mar 7, 1961
G04 - HOROLOGY
Information
Patent Grant
2949583
Patent number
2,949,583
Issue date
Aug 16, 1960
G04 - HOROLOGY
Information
Patent Grant
2847818
Patent number
2,847,818
Issue date
Aug 19, 1958
G04 - HOROLOGY
Information
Patent Grant
2761982
Patent number
2,761,982
Issue date
Sep 4, 1956
G04 - HOROLOGY
Information
Patent Grant
2739250
Patent number
2,739,250
Issue date
Mar 20, 1956
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
2642715
Patent number
2,642,715
Issue date
Jun 23, 1953
G04 - HOROLOGY
Patents Applications
last 30 patents