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Inlaid watch face prodn. - uses groove cut ultrasonically into face and insert of same shape fitted into groove
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DE2805740A1
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Inlaid watch face prodn. - uses groove cut by electro-erosion with sonotrode of shape of groove
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Automatic date and time marker for teleprinter - detects transmission pauses to release date and time from micro-processor
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Mist generator
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Watch face made from mother of pearl - includes mother of pearl wafer attached to backing plate
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Dental appliance
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Work furniture
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Electrical apparatus incorporating an accumulator
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Electric toothbrush
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Electric toothbrush
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Process for the production of hour signs
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