4. Fire escape, ladder, or scaffold
  5. Safety device, platform associated
  6. Railing

Roger Frank

Inventor

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Bar-tumbler type safety lock

Locks – Operating mechanism – Key
Patent

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Bar-tumbler type safety lock

Locks – Operating mechanism – Key
Patent

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Calibrating device for a water meter

Measuring and testing – Volume or rate of flow – Expansible chamber
Reexamination Certificate

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End cap system for scaffolding planks

Joints and connections – Interfitted members – Enlarged head in complementary recess – e.g. – dovetail – etc.
Patent

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End cap system for scaffolding planks

Joints and connections – Interfitted members – Enlarged head in complementary recess – e.g. – dovetail – etc.
Patent

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Profile ID: LFUS-PAI-P-440197

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