using more than one pendulum

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Industry

CPC
G04C3/025

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Parent Industries

GPHYSICS G04Horology G04CELECTROMECHANICAL CLOCKS OR WATCHES G04C3/00Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means

Current Industry

G04C3/025using more than one pendulum

Industries

Patents Grantslast 30 patents

Information Patent Grant
2820338
- Patent number 2,820,338
- Issue date Jan 21, 1958
- G04 - HOROLOGY
Information Patent Grant
341450
- Patent number 341,450
- Issue date May 11, 1886
- G04 - HOROLOGY
Information Patent Grant
340483
- Patent number 340,483
- Issue date Apr 20, 1886
- G04 - HOROLOGY