As spotted by GameRant, a Nintendo patent application published last week details a new handheld reminiscent of the company's DS and 3DS systems, but with a third screen and the ability to physically separate the unit into two devices.
After that report, ReserEra user Hexa identified the original World Intellectual Property Organization filing that served as the basis of GameRant's report.
The handheld would consist of two separate devices with screens, the second of which would also have a screen on its reverse side.
source https://www.gamesindustry.biz/nintendo-patent-details-a-handheld-that-splits-into-two
