Christophe,
Are you aware about WIPO/Patenscope plans, if any, to add Bangladesh patent information to Patenscope, as a result of IPR project which have been performed with technical assistance of EC and WIPO and included development of "automated database of granted patents" (see a presentation on 2010 WIPO Regional Workshop: Bangladesh Country Report,
http://www.wipo.int/meetings/en/doc_details.jsp?doc_id=140616, p.17)
Best Regards,
Alex