ent ▁will ▁be ▁vulner able ▁to ▁can cellation ▁if ▁it ▁is ▁not ▁worked ▁during ▁the ▁five - year ▁period ▁following ▁its ▁date ▁of ▁grant ing . ▁Although ▁there ▁are ▁no ▁explicit ▁prov isions ▁concerning ▁nom inal ▁working , ▁in ▁lieu ▁of ▁actual ▁working , ▁it ▁is ▁recommended ▁that ▁there ▁be ▁nom inal ▁working ▁before ▁the ▁fifth ▁anni versary ▁of ▁grant ing . ▁ ▁Reg istration : ▁In ▁October ▁ 2 0 0 7 ▁Iran ' s ▁parliament ▁approved ▁becoming ▁sign atory ▁to ▁the ▁Pat ent ▁Co operation ▁Tre aty ▁( P CT ) ▁which ▁enables ▁pat ent ▁hold ers ▁in ▁one ▁country ▁to ▁register ▁their ▁pat ents ▁in ▁P CT ▁member ▁countries ▁simply ▁by ▁fil ing ▁a ▁single ▁application ▁with ▁the ▁related ▁national ▁registration ▁authority . ▁ ▁To ▁register ▁a ▁pat ent , ▁the ▁documents ▁listed ▁below ▁must ▁be ▁presented ▁to ▁the ▁Pat ent ▁Office ▁within ▁six ▁months ▁of ▁the ▁date ▁of ▁the ▁Iran ian ▁application . ▁This ▁period ▁of ▁duration ▁may ▁be ▁renew ed ▁only ▁once ▁for ▁a ▁just ifiable ▁exc use . ▁ ▁The ▁applic ant ▁must ▁present ▁the ▁following ▁information : ▁name ▁and ▁address ; ▁title ▁of ▁the ▁in vention ▁or ▁discovery ; ▁power ▁of ▁att orney ▁d uly ▁legal ized ▁by ▁the ▁respective ▁Iran ian ▁cons ulate ; ▁cert ified ▁copy ▁of ▁the ▁corresponding ▁pat ent ▁certificate ▁( or ▁application ▁if ▁benef iting ▁from ▁Paris ▁Convention ▁prov isions ); ▁cert ified ▁copy ▁of ▁the ▁transfer ral ▁document , ▁if ▁the ▁applic ant ▁is ▁not ▁the ▁original ▁propriet or ;