Hot Rods Anyone know about these?

I spent a lot of time in the Thomas Register a long time ago. It is now Thomasnet.com. Your Internet again. I can't imagine where you'd find the big green books from 55 years ago. Libraries don't have that much space. Between Covid and fires, I suspect not many of us will be making a pilgramage to Napa to search archives. The patent office might be interesting.

 

Here is a link to the patents held by the inventor R.R. Hill : https://patents.google.com/?inventor=Hill+Raymond+Roger