4. Locks
  5. Operating mechanism
  6. Key

Peter H. Field

Inventor

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Cylinder lock assembly with a tailpiece rotationally coupled...

Locks – Attack-actuated defeating mechanisms
Reexamination Certificate

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Cylinder lock with changeable keyway

Locks – Operating mechanism – Key
Patent

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Dropbolt lock

Tools and hardware – Locking or closing device – Lock – latch or bolt
Patent

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Dropbolt lock assembly

Locks – Special application – For closures
Patent

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Hierarchical cylinder lock and key system

Locks – Operating mechanism – Key
Patent

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Profile ID: LFUS-PAI-P-570998

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