Nintendo files patent for standalone Switch Joy-Con controller
In May 2018, Nintendo filed a patent for a standalone Switch Joy-Con, which features images of an updated controller design. It was then officially registered in April 2020.
As pointed out by VGC, the Joy-Con from the patent doesn’t have connectors to attach the controller to the Switch console. The patent describes this as a “new design”.
It’s unclear what Nintendo’s plans are for the Joy-Con patent. The company could choose to produce an actual product in the future, though only time will tell if that actually happens.