4. Locks
  5. Operating mechanism
  6. Using a powered device

Walter J. Aston

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Electromagnetically activated mechanisms

Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent

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Electronic key-operable lock and key thereof

Locks – Operating mechanism – Using a powered device
Patent

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Electronic security device

Communications: electrical – Continuously variable indicating – With meter reading
Patent

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Lock, key and combination of lock and key

Communications: electrical – Continuously variable indicating – With meter reading
Patent

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Profile ID: LFUS-PAI-P-578338

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