The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 2024
Filed:
Jul. 10, 2019
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Masashi Shintaku, Musashino, JP;
Yoshihiro Iriyama, Musashino, JP;
Norihiro Fujimoto, Musashino, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
A conduit inspection method includes a first specifying step (S) of specifying, as a normal section of a conduit, a section from a first end (Pa) of the conduit that is connected to one manhole to a first position (P1) in the conduit at which airtightness can be confirmed, a second specifying step (S) of specifying, as a normal section of the conduit, a section from a second end (Pb) of the conduit that is connected to another manhole to a second position (P2) in the conduit at which airtightness can be confirmed, and a third specifying step (S) of specifying a section from the first position (P1) to the second position (P2) as an abnormal section of the conduit.