Maybe it is because of depositions like these:
http://www.abajournal.com/news/article/deposition_detour_on_meaning_of_photocopy_machine_is_immortalized_in_new_pe/
http://www.abajournal.com/news/article/deposition_detour_on_meaning_of_photocopy_machine_is_immortalized_in_new_pe/