> Apparently somebody claims a patent on the trackball, and sued Logitech, who have since ceased production of them. Huh? I'm confused. Thumb: https://www.log

> Apparently somebody claims a patent on the trackball, and sued Logitech, who have since ceased production of them. Huh? I'm confused. Thumb: https://www.logitech.com/en-us/product/wireless-trackball-m570?crid=7 https://www.logitech.com/en-us/product/wireless-trackball-m5... Finger: https://www.logitech.com/en-us/product/trackman-marble?crid=7 https://www.logitech.com/en-us/product/trackman-marble?crid=...