Retrofits introduced in electric clocks

• 1. 电子控制式机械钟表、电子控制式机械钟表的控制方法以及电子钟表 [P] . 中国专利： CN110554595B . 2022.02.25
• 2. 电子控制式机械钟表、电子控制式机械钟表的控制方法以及电子钟表 [P] . 中国专利： CN110554595A . 2019-12-10
• 3. Retrofits in pendulum clocks electric [P] . BR7409113D0 . 1975-04-08

  机译： 电动摆钟的改造

• 4. Retrofits in clock, in particular to an electric clock, adaptable vehicle [P] . BR7307268D0 . 1974-08-22

  机译： 改装时钟，特别是可改装的电子钟

• 5. Retrofits in and relating to support for bookmarks and electric circuit clocks [P] . BR7102991D0 . 1973-03-01

  机译： 书签和电路时钟支持方面的改造

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• 6. Electrical Clocks and Clockwork [O] . HENRY DENT GARDNER 1879

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