4. Communications: electrical
  5. Audible indication
  6. Percussion-type sound producer

Donald Winrow

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Display device

Card – picture – or sign exhibiting – Changing exhibitor – Alphanumeric device
Patent

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Display or indicating device with magnetic stop

Communications: electrical – Audible indication – Percussion-type sound producer
Patent

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Display or indicator element

Card – picture – or sign exhibiting – Changing exhibitor – Alphanumeric device
Patent

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Electromagnetic displays with resiliently mounted components

Communications: electrical – Audible indication – Percussion-type sound producer
Patent

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Gravity bias for display elements

Card – picture – or sign exhibiting – Check – label – or tag – Reinforced
Patent

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Profile ID: LFUS-PAI-P-489204

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