TY - GEN T1 - Ad hoc Working Group on the revision of the guide to the IPC :WIPO : 1988-[1 Session]. LA - eng N1 - (F/E) : French and English version; See French version in GROUPE DE TRAVAIL AD HOC SUR LA REVISION DU GUIDE D'UTILISATION DE LA CIB : OMPI; 1e Session : Londres, 25-29 avril 1988; IPC/RG/4/1/1-3;. ID - 18530 KW - Intellectual property. KW - WIPO AND UPOV DOCUMENTS : BIRPI : IPC UNION KW - UTILITY MODELS : NATIONAL LAW : COMMENTARIES KW - WIPO DOCUMENTS : BERNE UNION : COMMITTEES OF EXPERTS, CONFERENCES TI - Ad hoc Working Group on the revision of the guide to the IPC :WIPO : 1988-[1 Session]. ER -