Is a
Patent attributes
Patent Applicant
Patent Jurisdiction
Patent Number
Patent Inventor Names
Laurent Coiffard0
Dominique Davranche0
Jean-Yves Le Saout0
Date of Patent
November 29, 2022
0Patent Application Number
166503020
Date Filed
September 11, 2018
0Patent Citations
Patent Primary Examiner
CPC Code
A manhole cover for a manhole provided with an access opening and suitable for containing a device for transmitting a radiofrequency signal is described. The cover includes a wall for covering the access opening when the cover is in a closed position, where the wall includes at least one through-opening filled with a sealing material, the sealing material extending over the surface of the wall of the cover that is oriented towards the inside of the manhole when the cover is in a closed position, the sealing material comprising a material that is transparent to the propagation of a radiofrequency signal transmitted from and/or to the transmission device.
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