18 In accordance with the Guidelines for Substantive Examination of Invention Patent, which of thefollowing written or electronic form of material is not a “printed publication” under the Patent ActArt. 22?
(A) An oral presentation at the meeting, where the audiences are invited persons and the presentationmaterial was distributed to attendees in written form with restriction to sign a nondisclosureagreement.
(B) A doctoral thesis that was cataloged and shelved in only one university library, where there is noevidence that anyone ever actually looked at the manual.
(C) A reference available only in electronic form on the internet, which states that it was publiclyposted on June 16, 2020.
(D) A technical manual that was shelved and cataloged in a public library.