As used in this chapter:
(1) "Customer" means any individual or entity who causes a molder to fabricate, cast, or otherwise make a die, mold, form, or pattern or who provides a molder with a die, mold, form, or pattern to manufacture, assemble, cast, fabricate, or otherwise make a product for a customer.
(2) "Molder" means an individual or entity who fabricates, casts, or otherwise makes or uses a die, mold, form, or pattern for the purpose of manufacturing, assembling, casting, fabricating, or otherwise making a product for a customer. A "molder" includes, but is not limited to, a tool or die maker.
(3) "Within three years following the last use" must be construed to include any period following the last use of a die, mold, form, or pattern regardless of whether or not that period precedes the effective date of this chapter.