No, they're not for the public. They are for cast members on the Star Wars: Galactic Starcruiser that's opening soon. However I'm sure some of the more industrious members of the lightsaber community will eventually build their own version and maybe even improve on it.
I think that the biggest challenge, looking at the blue-print in the Patent document, is the series of 3 cogs and the chain situated at the side of the hilt. I guess it's needed (the torque) to get that "blade'' out of it. That could be improved and reduced (maybe) in size.
I would rather use a rubber belt than a chain.
Worked for Harley Davidson?
Real challenge is getting the blade moving faster, with smaller motor, smaller gears, smaller battery pack.
I'm an RC guy and all I can think is (dedicated to drivetrain) LIPO battery would fix 60% of that.
Bottom line: we need to dissect one of these, for RPF research purposes.
I remember trying to design something like this years ago but using rubber tubing for the blade. The idea was that it was thick enough to swing but flexible enough to be rolled into itself. The problem there was maintaining a solid structure while extended while also not losing shape after being rolled up. The theoretical solution to this theoretical build was using fishing line or a clear filament attached through the tubing and attached to the end cap. The internals would use Arduino-based motors to extend and retract the tubing into the blade. As I am not an engineer and seeing many flaws in this hypothetical lightsaber, am thrilled this real saber exists and looking forward to seeing it in action. Plus, this probably means there is a Kylo version of this somewhere out there. Which I can't wait to see.