Peripheral manufacturer GameVice has alluded that Nintendo’s importation of the Nintendo Switch has infringed on its patents in the United States. They didn’t explicitly state the Nintendo Switch, but the ITC is looking into a “certain portable gaming console systems with attachable handheld controllers and components”
US: International Trade Commission To Look Into GameVice Complaint Against Nintendo

Nintendo had enough getting sued over consoles of patients.
Vice: an immoral or evil habit or practice.
Synonyms: fault, failing, foible, weakness.
Antonyms: virtue.
Case dismissed.
Who? Oh patent troll.
Uhm… what? This doesn’t really explain what they are complaining about.
I feel this is probably just an attention grabber by gamevice. They tried suing Nintendo last year for the same thing but all the features the said the Switch “infringed” were not even present on their own device 🤔