In Googling for info on a particular cuemaker, I came across this Trademakr List. It appears to be a fairly comprehensive list of cuemakers who have trademarked their name, giving address, web site, and contact info. I have no idea who maintains this or how current it is, but thought it worth sharing.
https://store.bluebookinc.com/Info/PDF/POOLCUE/TrademarkIndex.pdf
https://store.bluebookinc.com/Info/PDF/POOLCUE/TrademarkIndex.pdf