Herters just sold other people stuff under the Herter name, they weren't manufacturers. Ideal was started by John Barlow in the late 1880's and was one of the first independent companies that just made equipment for reloaders. They published the first reloading manuals, made bullet molds, tong style tools etc for reloading. Prior to Ideal the reloading equipment was made by the firearm manufacturers like Winchester and Sharps to reload only their own cartridges. Ideal was bought first by Marlin in 1910, then sold to an individual in 1915, then finally bought by the "Lyman Gunsite Company" in 1922. Lyman kept the Ideal name, then marked the gear with both Ideal and Lyman as brand names, then after WWII dropped Ideal and just marked everything with the Lyman name.
A good book to look at is "Handloaders Manual" by Earl Naramore. Written in the 30's and goes through what was available then. Very different advise from what is given now as far as primers & cases; recommended that they match manufacturers as the flash holes were not yet standard sizes and the primer power was matched to the flash hole size. Also which primers were corrosive and which not. The powder availability was also much different, only two companies - Dupont and Hercules - are listed for smokeless powder, semi-smokeless (a mix of black and smokeless) powder still available from the King powder company. The Dupont IMR 3031 and 4198 powders were new for rifles, 4064 was the slowest listed, 2400 just introduced and most pistol cartridge loads for #5, #6 and #80. For Hercules, "Sharpshooter", "Lightning", HiVel #2 and #3 still available; only Unique and Bullseye would be recognized today.