UNITED STATES CODE, 1909 473
name of the copyright proprietor, and if the work be a printed literary, musical, or dramatic work, the notice shall include also the year in which the copyright was secured by publication. In the case, however, of copies of works specified in subsections (f) to (k), inclusive, of section five of this Act, the notice may consist of the letter C inclosed within a circle, thus: ©, accompanied by the initials, monogram, mark, or symbol of the copyright proprietor: Provided, That on some accessible portion of such copies or of the margin, back, permanent base, or pedestal, or of the substance on which such copies shall be mounted, his name shall appear. But in the case of works in which copyright is subsisting when this Act shall go into effect, the notice of copyright may be either in one of the forms prescribed herein or in one of those prescribed by the Act of June eighteenth, eighteen hundred and seventy-four.
Sec. 19. That the notice of copyright shall be applied, in the case of a book or other printed publication, upon its title-page or the page immediately following, or if a periodical either upon the title-page or upon the first page of text of each separate number or under the title heading, or if a musical work either upon its title-page or the first page of music: Provided, That one notice of copyright in each volume or in each number of a newspaper or periodical published shall suffice.
Sec. 20. That where the copyright proprietor has sought to comply with the provisions of this Act with respect to notice, the omission by accident or mistake of the prescribed notice from a particular copy or copies shall not invalidate the copyright or prevent recovery for infringement against any person who, after actual notice of the copyright, begins an undertaking to infringe it, but shall prevent the recovery of damages against an innocent infringer, who has been misled by the omission of the notice; and in a suit for infringement no permanent injunction shall be had unless the copyright proprietor shall reimburse to the innocent infringer his reasonable outlay, innocently incurred, if the court, in its discretion, shall so direct.
