The original inventors of the Slidelock are an American couple from whom I purchased the patent.
I"m not saying you don't own the patent. Or that the ones sold in the US are not original. I'm saying I ordered one from Australia in late 90's or early 2000's, don't remember. Looks just like the ones sold later here. I have the US and Australia versions. I'm glad they are being made again no matter who is making them.