wis 7777.60 Annotation The petitioner did not identify an equal protection problem when arguing that the absence of a limitations period in sub. (9), when compared with the general four-year77.53(16) (16) If the purchase, rental or lease of tangible personal property, or items, property, or goods under s. 77.52 (1) (b), , or , or service subject to the tax imposed by this section