If is of course possible that his company made some. But it looks like most of their work was making kits for dune buggies. In my research I also saw a reference to a boat that was for sale
. The company was called Poty Enterprises.
Here is a link to an image of a dune buggie advertisement from that company. It list the two addresses for a location in the East and another in the West where they had production facilities.
One valuable resource for this kind of research is to see if there are historic article archives from the local newspapers or business journals that may have written feature articles on the company. That is why I gave you the image with the addresses for that company, you can do the deep research for yourself.