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Manhole cover support having interbraced top members

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

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Manhole cover support resistant to water infiltration

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

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Manhole cover support ring

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

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Manhole cover support ring

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

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Manhole cover support with box flanging

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

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Manhole cover support with flange borne on its own base

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

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Manhole cover support with topside flange

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

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Manhole cover support with topside flange and inclined seat

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

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Manhole cover system

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

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Manhole cover tool

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

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Manhole covering

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

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Manhole covers with attachment means for decorative strips

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

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Manhole extender ring system and method of use

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

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Manhole extension

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

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Manhole extension assembly

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

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Manhole frame

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

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Manhole frame assembly

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

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Manhole frame with adjustment screws

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

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Manhole grade adjusting ring and method

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

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Manhole having a splayed rib ring formed at underside of the lid

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

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