With Third, Detached Member Completing Interlock Patents (Class 24/DIG31)

Digests

And linking cavities in adjacent parallel panels (Class 24/DIG32)
Third member includes independently engaged hooks for linking spaced cavities (Class 24/DIG33)
Third member includes relatively movable, separate components (Class 24/DIG35)
Third member consists of unitary elongated element (Class 24/DIG37)

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