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Nondestructive system for adjusting manhole and catch-basin...

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

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Opening and closing apparatus for manhole cover

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

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Pad for supporting a utility access conduit and method for insta

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

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Pad for supporting a utility access conduit and method for insta

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

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Panel inspection plug and method for assembling and using same

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

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Parabolic cover for manhole

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

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Plastic fillable manhole cover with penetrating handles

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

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Polygonal manhole cover support

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

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Protective housing for sewer or septic clean-out lines

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

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Quick manhole/handhole construction method and related devices

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

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Quick opening manhole cover assembly for use with virtually any

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

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Ramp for temporarily elevated utility access hole

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

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Ready-to-install road building apparatus and corresponding...

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

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Rehabilitated manhole cover

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

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Reinforced composite manhole cover assembly

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

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Removable aircraft servicing pit lid

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

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Restrainable manhole cover, handhole cover and the open/close de

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

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Road gully or inspection cover assembly

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

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Road inspection manhole

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

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Road manhole

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

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