Microsoft may be getting in on the smartwatch game.
The U.S. Patent Office has released an application from the software maker for a smartwatch design that could challenge offerings from rivals such as Samsung, Apple.
In the application, filed back in October 2012 but released only last week, Microsoft outlines plans for a wristwatch that would serve as a fitness tracker and could also function as a music player, phone and messaging device. The watch face itself detaches from the wristband and connects to a charging dock.
Microsoft will be playing catch-up to Samsung, which released its Galaxy Gear smartwatch last year. Google plans to release the Moto 360 smartwatch in the U.S. this summer, while Apple has long been rumored to be developing a smartwatch of its own.