4. Electrical transmission or interconnection systems
  5. Nonlinear reactor systems
  6. Parametrons

Pforzheimer Uhren-Rohwerke Porta GmbH

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Arrangement for limiting the axial play of gears of a watch time

Horology: time measuring systems or devices – Display trains
Patent

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Drive coupling

Horology: time measuring systems or devices – Arbor and pinion details
Patent

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Power supply control arrangement for a watch stepping motor

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent

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Watch drive

Horology: time measuring systems or devices – Staff and bearing details
Patent

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Watch operating mechanism mounting arrangement

Horology: time measuring systems or devices – Power supply details
Patent

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Profile ID: LFUS-PAI-P-1101585

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