Oregon Revised Statutes Education and Culture § 359.355

(1) Whenever a work of fine art is sold or otherwise transferred by or on behalf of the artist who created it, or the heirs or personal representatives thereof, the right of reproduction thereof is reserved to the grantor until the right passes into the public domain pursuant to federal copyright laws unless the right is sooner expressly transferred by an instrument, note or memorandum in writing signed by the owner of the rights conveyed or the duly authorized agent thereof.

(2) Nothing contained in this section is intended to prohibit the fair use, as defined in the federal copyright law (17 U.S.C. 107), of such work of fine art.