Default Notification light

Does Google have a patent on the notification style of the light or is it just a trademark style or something?

I had both my Nexus 5 & 7 sitting on my desk and the notification lights were both going off. They are the same style. A diffused light with little dots spread across the edges. I believe the same style of notification was on the Nexus 4 as well.

Now, the Nexus 5 is made by LG and the Nexus 7 is made by Asus.