Https://classnotes.textiles.ncsu.edu/wp-content/uploads/formidable/2/complete-list-of-copyright-a-tm-official-customer-service-contact-numbers-An-assistance-guide.pdf https://classnotes.textiles.ncsu.edu/wp-content/uploads/formidable/2/complete-list-of-copyright-a-tm-official-customer-service-contact-numbers-An-assistance-guide.pdf