Ellen Curtis Demorest and Ebeneezer Butterick are the two names most often invoked as the start of multi-sized patterns printed for home sewists. Once they proved it was a viable business, a lot of other offerings appeared.
Research:

Sara Weiss’s Journeys to the Planet Mars
39:45

SYMHC Classics: Charles Colchester
33:49

Behind the Scenes Minis: Lager, Ale, Emo Girl
25:06