Thông tin về bản quyền sáng chế điện thoại của G.Bell:
" On 14 February 1876, Bell was in Boston. Hubbard, who was paying for the costs of Bell's patents, told his patent lawyer Anthony Pollok to file Bell's application in the U.S. Patent Office. This was done without Bell's knowledge. Patent Number 174,465 was issued to Bell on 7 March 1876 by the U.S. Patent Office which covered "the method of, and apparatus for, transmitting vocal or other sounds telegraphically… by causing electrical undulations, similar in form to the vibrations of the air accompanying the said vocal or other sound."
Nếu có thời gian bác vào trang của Cục sáng chế liên bang Hợp chủng quốc Hoa Kỳ:
http://www.uspto.gov/# Lục tìm thể nào cũng có tư liệu về bằng sáng chế cấp cho G.Bell.