Cal. Civil Code § 980

(a) (1) The author of any original work of authorship that is not fixed in any tangible medium of expression has an exclusive ownership in the representation or expression thereof as against all persons except one who orginally and independently creates the same or similar work. A work shall be considered not fixed when it is not embodied in a tangible medium of expression or when its embodiment in a tangible medium of expression is not sufficiently permanent or stable to permit it to be perceived, reproduced, or otherwise communicated for a period of more than transitory duration, either directly or with the aid of a machine or device. (2) The author of an original work of authorship consisting of a sound recording initially fixed prior to February 15, 1972, has an exclusive ownership therein until February 15, 2047, as against all persons except one who independently makes or duplicates another sound recording that does not directly or indirectly recapture the actual sounds fixed in such prior sound recording, but consists entirely of an independent fixation of other sounds, even though such sounds imitate or simulate the sounds contained in the prior sound recording. (b) The inventor or proprietor of any invention or design, with or without delineation, or other graphical representation, has an exclusive ownership therein, and in the representation or expression thereof, which continues so long as the invention or design and the representations or expressions thereof made by him remain in his possession.