Sort of. In the US, an example of a labeling requirement is 16 CFR Part 1101. In certain circumstances, there must be "public disclosure of information from which the identity of a manufacturer or private labeler of a product can be readily ascertained". Not everything is subject to this mandatory disclosure – it is driven by safety of consumer products. The Consumer Product Safety Commission summarizes some of the requirements here, and the strongest requirements are on "child products". A train car-load of pig iron would not be subject to such labeling (but then, you would probably know the manufacturer from the contract that you had to buy the iron). You can garner all of the safety regulations from 16 CFR Ch. II. 16 CFR Ch. I is the regulations established by the FTC under the Fair Packaging and Labeling Act. This requires all "consumer products" to have a label, especially Part 500. This only applies to commodities in a package or with a label (not hardware from a bin or bulk sim-cards). §500.5 is the section that says that you have to say who the manufacturer is.