Wis. Stat. § 409.317
Sub. (2) is amended eff. 7-1-13 by 2011 Wis. Act 206 to read:
(2) Buyers that receive delivery. Except as otherwise provided in sub. (5), a buyer, other than a secured party, of tangible chattel paper, tangible documents, goods, instruments, or a certificated security takes free of a security interest or agricultural lien if the buyer gives value and receives delivery of the collateral without knowledge of the security interest or agricultural lien and before it is perfected.
Sub. (4) is amended eff. 7-1-13 by 2011 Wis. Act 206 to read:
(4) Licensees and buyers of certain collateral. A licensee of a general intangible or a buyer, other than a secured party, of collateral other than tangible chattel paper, tangible documents, goods, instruments, or a certificated security takes free of a security interest if the licensee or buyer gives value without knowledge of the security interest and before it is perfected.