The designs appear in a patent filing published on February 14, just as Samsung is preparing to show off its first ever foldable phone at a launch event on Wednesday.
The filing gives technical details about how a hinged, foldable display would work, and shows rough sketches of devices that fold in half, or fold into thirds.
A foldable device with three sections.
US Patent Office/Apple
The filing states that it isn't just smartphones that could function with a foldable display, but also laptops, tablets, smartwatches, and even headphones.
Apple's patent filings show a device that can fold in half.
US Patent Office/Apple
These aren't the first patent filings to hint at a bendy iPhone. In 2016, a fairly wacky patent filing hinted at an iPhone with a wraparound display.
The latest filing doesn't necessarily mean Apple will launch a foldable iPhone in the near future. The filing is just an application, and it hasn't been granted by the US Patent Office yet. Tech firms often patent futuristic ideas and designs that never see the light of day.
Still, Apple is the only major smartphone manufacturer not talking about foldable phones. Huawei confirmed it was working on a 5G foldable phone, and Samsung is expected to show off a foldable phone alongside its flagship Galaxy S10 on Wednesday.