what license is required for ice factory ? who invented ice factory ? how is ice made in ice factory 

Who invented ice factory?
Alexander Twining
1853 - Alexander Twining was awarded U.S. Patent 10221 for an ice maker. Twining's experiments led to the development of the first commercial refrigeration system, built in 1856. He also established the first artificial method of producing ice.
Who first sold ice?
Frederick Tudor
The Refrigerated Ice Box was invented by Thomas Moore. Frederick Tudor, aka the "Ice King", (1783-1864), known as the founder of the “Natural Ice Trade”. Tudor came from a wealthy family and instead of following in his brothers' footsteps of going to Harvard, he worked in Boston Harbor loading wooden hulled ships
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