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

David C. Janssen

Inventor

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Anti-magnetic tampering system for automobile ignition lock

Locks – Special application – For automotive vehicles
Patent

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Breakaway cylinder head

Locks – Operating mechanism – Key
Patent

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Fail safe system for a mechanical lock and key set with electric

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

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Fail safe system for a mechanical lock key set with electronic i

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

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Key assembly for vehicle ignition locks

Locks – Operating mechanism – Using a powered device
Reexamination Certificate

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Profile ID: LFUS-PAI-P-306799

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