Modernizing American Manufacturing Bonds Act This bill amends the Internal Revenue Code, with respect to qualified small issue bonds for manufacturing purposes, to expand the definition of "manufacturing facility" to include a facility that: (1) is used in the creation or production of intangible property; or (2) is functionally related, subordinate to, and located on the same site as a facility used in the manufacturing or production of tangible personal property or in the creation or production of intangible property. The bill also increases from $10 million to $30 million the maximum bond limitation.