4 ms·
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.
by beambot 4y ago
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.
- maxerickson 4y agoFiling date was November 2017.
- beambot 4y agoIf 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-120mm-bionic-loop-propeller-fans.1289723/ https://www.overclock.net/threads/noiseblocker-nb-eloop-120m...
- maxerickson 4y agoYeah, I missed the 2012 in the other comment.