4. Static structures (e.g., buildings)
  5. Specified terranean relationship
  6. Subterranean enclosure with portal opening; e.g., storm or...

Manfred Janitzky

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Protective device for anti-aircraft installations and nuclear po

Movable or removable closures – With means mounting closure for swinging – Closure nests within portal frame
Patent

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Underground shelter

Static structures (e.g. – buildings) – Specified terranean relationship – Subterranean enclosure with portal opening; e.g. – storm or...
Patent

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Profile ID: LFUS-PAI-P-1225451

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