The patent to this rose reads a little odd to me. It doesn't state a plant patent but it states other coding instead.

"Application number: 10/114,445
Publication number: US 2003/0192090 P1
Filing date: Apr 3, 2002"

"[0003] The new variety of Rosa hybrida Hybrid Tea rose plant was created by artificial pollination wherein two parents were crossed which previously had been studied in the hope that they would contribute the desired characteristics. The female parent (i.e., the seed parent) was the 'Purple Splendour' variety (non-patented in the United States). The male parent (i.e., the pollen parent) was the product of the cross of the 'Johnago' variety (non-patented in the United States) and the 'Meikinosi' variety (nonpatented in the United States). The 'Meikinosi' variety sometimes is known as the 'Tchin-Tchin' variety. The parentage of the new variety can be summarized as follows:

'Purple Splendour'x('Johnago'x'Meikinosi')."

So, we know now that the Tchin-Tchin stated as a parent is the yellow HT version and not the orange-red floribunda version.