Found this while plundering on Google Books. I posted it on Ford Facts in an easier to read format.
This may have been posted before, but if not,it's a good read.
These are 1911 - 12 advertisements for Mosler plugs as mentioned in the lawsuit. I have one of these around here somewhere, the porcelain is interchangeable with a straight sided X Champion plug.
It is a good read. Also Luke, for your info, the paragraph snippet after page 409 is a duplicate. The snippet starts "Learned Hand".
Forgot to mention:
I wonder why the judge allowed the advertising to continue. It's clear by Royce's last image that Mosler was making copies of the X as stated in the ad.