Envelope sealing machines, for offices; Electric paper hole perforators being office requisites and parts therefor, namely, boring bits, protection plates, and grinders; Document binding machines for office use; Electric paper hole punches being office requisites and parts therefor, namely, boring bits, protection plates, and grinders; Adhesive materials for office use; Ink rollers for office machines; Bookbinding machines for office use; Office perforating machines; Office type composing mac...