I need more details which the article doesn't provide but I'm pretty sure vibration is common knowledge and what could the design possibly done that was so patentable
Vibration might be, but the Taptic Engine is differentiated and trademarked as Apple's own unique feature: https://uspto.report/TM/86543432
Vibration might be, but the Taptic Engine is differentiated and trademarked as Apple's own unique feature: https://uspto.report/TM/86543432