I call this one the rubber band bow. According to the description, you can use a rubber tube or band for the bowstring.
As I've said before, I'm always amazed at the gadgets some people have come up with in an attempt to build a better mouse trap, or bow.
I haven't seen any advertisements for this contraption, so I wonder if it ever got into production.

Bob, I guess you had to believe your invention was good enough to put in the effort and expense.
Good one Steve. Unlike any bowfishing outfit I've ever seen.
Another doozy Ira
I watched this the other day, fits the bill I think: https://www.youtube.com/watch?v=az0OyOY-8vY&t=395s
Thanks for all your interesting posts Ira!
Can you imagine he paid a patent attorney too?
Bob