4. Road structure, process, or apparatus
  5. Pavement
  6. Vault cover-closure
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Device for a pavement manhole with a support frame for...

Road structure – process – or apparatus – Pavement – Vault cover-closure
Reexamination Certificate

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Device for covering shafts

Road structure – process – or apparatus – Pavement – Vault cover-closure
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Device for raising level of manhole cover

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

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Device permitting a plug or a cover to lock in a detachable...

Road structure – process – or apparatus – Pavement – Vault cover-closure
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Double pivot semi-automatic manhole cover lifting device

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

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Dual lifting manhole cover

Road structure – process – or apparatus – Pavement – Vault cover-closure
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0
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