I had a quick breeze through the Lionel patents. I'm so glad I'm not a patent attorney.
My take is that as TR is patenting his stuff as well he's versed enough in patents to know what the score is and we probably have little to worry about.
I also think (remember, not a patent attorney) that yes while a patent protects your invention that doesn't stop (protect your patent) from someone else independently inventing the same outcome as yours with a different process or design.
- Tim