Yes, it is a noun. It is a plural noun meaning products made as a result (other than the main one) of a process.
There is no specific collective noun for 'products', however a noun suitable for the situation can be used; for example a line of products, a display of products, a catelog of products, etc.
Product is a noun.
NOUN
products
Yes the word leather is a noun. It is an uncountable noun.
Yes the word inventors is a noun. It is the plural of inventor.
No, ice cap is a common noun. It is only a proper noun if it is the name of something specific, such as Ice Cap, Alaska or Ice Cap Products.
Yes, Chevrolet is a the name of a specific company and its products.
That is the correct spelling of the plural noun "products" (items, goods).
Innovation is a noun, referring to the process or result of introducing new ideas, methods, or products. It is not typically used as a verb.
The likely word is the plural noun multiples (integer products of an integer).
Yes, "American-made" should be hyphenated when used as a compound adjective before a noun. For example, you would write "American-made products." However, if it follows the noun, it does not need to be hyphenated, as in "These products are American made."