ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,729,798, issued on Sept. 8, was assigned to SHONAN GOSEI-JUSHI-SEISAKUSHO K. K. (Hiratsuka, Japan).
"Pipe rehabilitation method" was invented by Takao Kamiyama (Hiratsuka, Japan) and Makoto Ishida (Hiratsuka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A coupler having elastically deformable claws 32, 33 is fixed to the side plate 103 of one segment 1a. The side plate 103 of the one segment 1a and the side plate 102 of the other segment 1b are butted against each other, and the claws of the coupler are passed through the side plate of the other segment to protrude into the segment. The claws of the coupler protruding into the other segment are ...