(under subclass 138.1) Tubular way including a means movable therewithin for inspecting, servicing, treating, cleaning, or performing some other maintenance function upon the interior of the tubular way.
(1) Note. This subclass contains patents directed to the motive systems for carrying and moving the actual servicing tools through the interior of a tubular way. If the specific servicing tool is more than nominally claimed (even in combination with the motive carrying device), the patent is located in the appropriate classes provided for the tool.
