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Electromechanical timepiece
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Patent number 10,996,629
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Issue date May 4, 2021
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The Swatch Group Research and Development Ltd.
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Massimiliano Bracco
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Electrochemical reed filter
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Patent number 3,974,466
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Issue date Aug 10, 1976
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Matsushita Electric Industrial Co., Ltd.
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Toshiharu Tanaka
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H03 - BASIC ELECTRONIC CIRCUITRY
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3877215
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Patent number 3,877,215
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Issue date Apr 15, 1975
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G04 - HOROLOGY
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3851385
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Patent number 3,851,385
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Issue date Dec 3, 1974
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G04 - HOROLOGY
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3833999
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Patent number 3,833,999
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Issue date Sep 10, 1974
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3760482
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Patent number 3,760,482
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Issue date Sep 25, 1973
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G04 - HOROLOGY
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3759133
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Patent number 3,759,133
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Issue date Sep 18, 1973
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3751899
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Patent number 3,751,899
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Issue date Aug 14, 1973
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G04 - HOROLOGY
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3736743
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Patent number 3,736,743
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Issue date Jun 5, 1973
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G04 - HOROLOGY
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3678307
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Patent number 3,678,307
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Issue date Jul 18, 1972
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G04 - HOROLOGY
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3638416
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Patent number 3,638,416
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Issue date Feb 1, 1972
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G04 - HOROLOGY
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3636469
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Patent number 3,636,469
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Issue date Jan 18, 1972
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H03 - BASIC ELECTRONIC CIRCUITRY
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3631276
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Patent number 3,631,276
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Issue date Dec 28, 1971
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G04 - HOROLOGY
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3628324
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Patent number 3,628,324
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Issue date Dec 21, 1971
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G04 - HOROLOGY
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3621467
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Patent number 3,621,467
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Issue date Nov 16, 1971
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H03 - BASIC ELECTRONIC CIRCUITRY
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3616636
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Patent number 3,616,636
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Issue date Nov 2, 1971
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G04 - HOROLOGY
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3604202
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Patent number 3,604,202
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Issue date Sep 14, 1971
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G04 - HOROLOGY
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3585424
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Patent number 3,585,424
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Issue date Jun 15, 1971
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3579975
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Patent number 3,579,975
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Issue date May 25, 1971
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G04 - HOROLOGY