I doubt it. The printer vendors paid the license fees decades ago and the patents have since expired. While researching this comment I read an article from 19

I doubt it. The printer vendors paid the license fees decades ago and the patents have since expired. While researching this comment I read an article from 1997 about how Adobe changed the spec to be able to extract more revenue. Whatever patent they used as a stick has since expired. I can't really find a definitive answer, of course, but all of the basics are from the early 90s, with some obvious followup "oh shit we need money" patents from 2000. (Obviously, 2000s era technology seems obvious today. I don't know if it was obvious in 2000. Things like "4 digit dates" were a new idea back then ;)