I should preface this by saying that patents don't mean products. This could simply be Microsoft's way of protecting future ideas or prototypes that are simply too costly or problematic to ever see production. Still, it offers a tantalizing glimpse of what could be on the horizon.
A new patent granted to Microsoft last week shows dual and triple-hinged devices that support multiple configurations. They can be folded into something small and phone-like, placed in a "tent" mode, and even folded out to create a larger tablet. If this is Microsoft's vision for the Surface Phone, it will have very few comparable devices on the market, and certainly fits the Surface modus operandi of bringing something totally unique to existing form factors.
The patent's various configurations reveal double, and even triple-screened phones, that the patent describes as both a mini-tablet and a phone. The devices, which also include slide-out models that appear to include different types of housings, are described as supporting several use cases given the varied configurations possible as a result of their hinges.
It's particularly interesting, as Microsoft was also recently awarded a patent for an electrical hinge that would naturally be essential in any and, perhaps even all of these designs.
Patent filings don't always translate into products for market, but these recent developments are especially intriguing. Microsoft has long been teasing spiritually Surface-like mobile devices, and those devices, hopefully, are just around the corner.