Yeah, that's what I expected. It's interesting, though, as that patent was one of the first things that came to mind when I watched the reveal video, with the Switch's form-factor being seemingly perfect to accommodate the tech. The joycon grip would potentially even allow the use of the passive controllers while docked. But choosing not to include it in this patent would be an odd decision if they were actually going ahead with using the functionality in Switch.
It does introduce a couple of questions, though, as there is more going on on the sides of the Switch than the patent covers. It's difficult to see in most photos, but the lighting in this photo allows you to see a few regularly spaced marks down each side of the Switch:
Here's a zoomed version which I've brightened a bit to make it easier to see:
There's clearly a lot more going on here than you can see in the patent diagram:
Aside from the communication interface at the bottom, the only feature the patent shows along the side of the Switch is a single hole to allow the controller to lock into place. It's possible that what we're looking at is just additional grooves/holes/whatever to help guide the joycon into place and lock it there, but I don't really see the need for it.
Anyway, it'll be interesting to finally find all these things out come January.