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:

Behind the Scenes Minis: Bad Laws, Bad Cats
23:33

Carrington Event
43:31

United States v. Bhagat Singh Thind
46:30