Who is the manufacturer of Sonic Knife?

There seems to be some confusion. "Sonic Knife" is not a widely known or established product name. It's possible you're thinking of a different product or that it's a niche or local product.

To help you find the information you're looking for, could you please provide more context? For example:

* Where did you hear about this product? (e.g., website, advertisement, store)

* What is the product supposed to do? (e.g., cut, vibrate, make noise)

* Can you describe the product? (e.g., size, shape, materials)

With more information, I can help you find the manufacturer of the product you're looking for.