4. Movable or removable closures
  5. Plural wings radiate from common pivot; i.e., revolving

Michael B. Zekich

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Revolving door system

Movable or removable closures – Plural wings radiate from common pivot; i.e. – revolving
Patent

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Revolving door system

Movable or removable closures – Plural wings radiate from common pivot; i.e. – revolving
Patent

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Revolving door system

Movable or removable closures – Plural wings radiate from common pivot; i.e. – revolving – Wings fold for through passage
Patent

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Security system for selectively allowing passage from a non-secu

Safes – bank protection – or a related device – Bank protection devices – Trapping mechanisms
Patent

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