4. Road structure, process, or apparatus
  5. Pavement
  6. Vault cover-closure

Robert Dumortier

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Latch for utility access door

Locks – Special application – For closures
Patent

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Latching arrangement for manhole cover

Closure fasteners – Bolts – Swinging
Patent

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Manhole cover assembly

Road structure – process – or apparatus – Pavement – Vault cover-closure
Patent

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Manhole with articulated cover members

Road structure – process – or apparatus – Pavement – Vault cover-closure
Patent

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Profile ID: LFUS-PAI-P-629203

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