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I remember that, and Shimano patenting the remote shifting buttons as well.
Odd that the climber/sprint shift buttons are a tightly held patent, but Shimano can’t prevent this. Or maybe their lawyers haven’t seen it yet.
All three groupset makers patent stuff they have no interest in making. Either because it needs 10 years of refinement or just so a rival can’t make it.
davidual
gbj_tester
Shimano had something similar years ago. 2011 it was filed, in fact.
https://www.bikeradar.com/features/shimano-electronic-gears-could-soon-charge-themselves/