An important safeguard, new in copyright law, is enacted in the provision (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."
It is further provided (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."
Although the code of 1909 relieves the copyright proprietor from permanent forfeiture in the case of an accidental omission of the copyright notice from certain copies (sec. 20), the statute is otherwise specific, and there seems to be no means of relief where the copyright notice is, however innocently, in the wrong place or in the wrong form. Thus in 1909, in Freeman _v._ Trade Register, the U. S. Circuit Court held that where the copyright notice of a periodical appeared on the editorial page, which was not the first page of text, the copyright was voided. The copyright notice can probably, however, be placed safely and preferably on the first page, being the title-page, of a specially copyrighted part of a book, as an introduction preceding a non-copyright work or an index or appended notes, or upon specific illustrations; and this is perhaps preferable in copyrighting editions with such features of works otherwise in the public domain. In the case of articles in a periodical or parts of a composite work separately copyrighted or registered, the copyright notice should appear on the same page as the title heading.