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@BetterShifting.Terry
Here it is!
https://patents.justia.com/patent/11685470
Interesting (I thought): the system lets you select a cassette... 9 speed, 10-speed... or 11-speed or more.
(according to the images, I use pat2pdf to get the PDF with images).
And it seems there's also a wireless-but-with-mechanical-cable system, just like Archer.