4. Closure fasteners
  5. Knobs

Richard R. Bettger

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Construction keying

Locks – Operating mechanism – Key
Patent

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Lever spindle spring cage

Closure fasteners – Knob rose plates
Patent

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Retrofit lever assembly for a door knob

Closure fasteners – Knobs
Patent

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Profile ID: LFUS-PAI-P-1175850

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