Wisconsin Statutes Uniform Commercial Code (Ch. 401 to 420) § 409.310. When filing required to perfect security interest or agricultural lien; security interests and agricultural liens to which filing provisions do not apply

(a) That is perfected under s. 409.308(4), (5), (6), or (7);

(b) That is perfected under s. 409.309 when it attaches;

(c) In property subject to a statute, regulation, or treaty described in s. 409.311(1);

(d) In goods in possession of a bailee which is perfected under s. 409.312(4)(a) or (b);

(e) In certificated securities, documents, goods, or instruments which is perfected without filing, control, or possession under s. 409.312(5), (6), or (7);

(f) In collateral in the secured party's possession under s. 409.313;

(g) In a certificated security which is perfected by delivery of the security certificate to the secured party under s. 409.313;

(h) In deposit accounts, electronic chattel paper, electronic documents, investment property, or letter-of-credit rights which is perfected by control under s. 409.314;

(i) In proceeds which is perfected under s. 409.315;  or

(j) That is perfected under s. 409.316.