Patents [CAP. 400 9 (a) known or used anywhere in the former Federation of Rhodesia and Nyasaland or, after the l.st January, 1964, in the former Protectorate of Northern Rhodesia or, after the 24th October, 1964, in the Republic (hereinafter in this definition referred to as "the said territories") by anyone other than the applicant or his agent, or the person or persons from or through whom such applicant has derived his right or title (secret knowledge or secret user other­ wise than on a commercial scale being excluded); (b) worked anywhere in the said territories otherwise than by way of reasonable technical trial or experi­ ment by the applicant or any person or persons from or through whom such applicant has derived his right or title; (c) described in a patent specification available to pub­ lic inspection in accordance with the Patents (Southern Rhodesia) Act, Chapter 208 of the 1948 Edinon of the Laws, the Registration of United Kingdom Patents Act, Chapter 205 of the 1957 Edition of the Laws (hereinafter in this section referred to as "such legislation") or this Act and bearing a date less than fifty years prior to such effective date; (d) described in writing in any publication of which there was a copy anywhere in the said territories at the effective date of the application. or in a publi­ cation printed and published outside the said terri­ tories less than fifty years prior to such date; (e) claimed in any complete specification for a patent which was lodged in accordance with such legisla­ tion or this Act and which, though not available to public inspection at the effective date of the appli­ cation. was deposited pursuant to an application for a patent which is, or will be, of prior date to the date of any patent which may be granted in respect of the said invention; "patent" means 'letters patent for an invention granted for Zambia under section twenty-five; "patent agent" means a person who is registered as such in terms of subsection (1) of section sixty-eight; "patent of addition" means a patent granted under section thirty­ , one; , "Patent Office" means the Patent Office established under sec­ tion three; "patented article" means any article in respect of which a patent has been granted and is for the time being in force;