[lightedman]

"The innovation here is making ultrasonic hardware compact enough to fit in the knife handle."

I was using ultrasonic scalpels back in 2002. They were smaller than this knife.

[thebenedict]

Were they standalone devices, or was the ultrasonic hardware in a separate enclosure connected by a cord?

[lightedman]

Standalone but bulky, about as thick as a dry erase marker.