[nsns]

From the Reddit comment linked by rybosome below:

>Some have questioned why no companies such as Boeing, Lockheed Martin, or SpaceX have attempted to investigate the device, but regardless of how likely these companies find the results so far, the largest reason is almost surely that the devices are both patented by their inventors.

[TheSpiceIsLife]

That shouldn't stop you from building and testing the device though, right? Only that if you wanted to commercialise it you'd have to come to an agreement with the patent holder, or maybe buy the patent.

If it worked, being first to market with an exclusive agreement with the patent holder would be lucrative.