They are very similar, just with more toroids attached to the central shaft. They also render the patent completely invalid by way of prior art.

Filing date was November 2017.

If you look at computer case fans, you can find commercial examples dating back to at least 2012 that are specifically meant to curb noise:

https://www.overclock.net/threads/noiseblocker-nb-eloop-120m...

Yeah, I missed the 2012 in the other comment.