Printed publication

In patent law, a reference is deemed a printed publication "upon a satisfactory showing that such document has been disseminated or otherwise made available to the extent that persons interested and ordinarily skilled in the subject matter or art, exercising reasonable diligence, can locate it."

An electronic publication, including an on-line database or Internet publication, is considered to be a "printed publication" within the meaning of 35 U.S.C. §102(a) and (b) provided the publication was accessible to persons concerned with the art to which the document relates.

Source

 * MPEP ¶2128.