16 Office and organisation items, such as: ring binders, folders and document ring binders, cardboard cases; looseleaf binders and their mechanisms, files, receipt books for invoices, registers control tokens, forms, envelopes, address and telephone indexes, agendas, engagement books, calendars, folders, portfolios, clipboards, notebooks, pads, writing books and other paper and cardboard articles (not included in other classes) intended for organisation and classification