Title: Alexander Graham Bell
Content:  Alexander Graham Bell (born Alexander Bell, March 3, 1847 – August 2, 1922) was a Scottish-born inventor, scientist, and engineer who is credited with inventing and patenting the first practical telephone. He also co-founded the American Telephone and Telegraph Company (AT&T) in 1885. Bell's father, grandfather, and brother had all been associated with work on elocution and speech and both his mother and wife were deaf; profoundly influencing Bell's life's work. His research on hearing and speech further led him to experiment with hearing devices which eventually culminated in Bell being awarded the first U.S. patent for the telephone, on March 7, 1876. Bell considered his invention an intrusion on his real work as a scientist and refused to have a telephone in his study. Many other inventions marked Bell's later life, including groundbreaking work in optical telecommunications, hydrofoils, and aeronautics. Although Bell was not one of the 33 founders of the National Geographic Society, he had a strong influence on the magazine while serving as the second president from January 7, 1898, until 1903. Beyond his work in engineering, Bell had a deep interest in the emerging science of heredity.
Title: Alexander Graham Bell
Content:  wax for tinfoil as the recording medium and incising the recording rather than indenting it, key upgrades that Edison himself later adopted. The laboratory was also the site where he and his associate invented his "proudest achievement", "the photophone", the "optical telephone" which presaged fibre optical telecommunications while the Volta Bureau would later evolve into the Alexander Graham Bell Association for the Deaf and Hard of Hearing (the AG Bell), a leading center for the research and pedagogy of deafness. In partnership with Gardiner Greene Hubbard, Bell helped establish the publication Science during the early 1880s. In 1898, Bell was elected as the second president of 
Title: Alexander Graham Bell
Content:   Although Alexander Graham Bell is most often associated with the invention of the telephone, his interests were extremely varied. According to one of his biographers, Charlotte Gray, Bell's work ranged "unfettered across the scientific landscape" and he often went to bed voraciously reading the Encyclopædia Britannica, scouring it for new areas of interest. The range of Bell's inventive genius is represented only in part by the 18 patents granted in his name alone and the 12 he shared with his collaborators. These included 14 for the telephone and telegraph, four for the photophone, one for the phonograph, five for aerial vehicles, four for "hydroairplanes", and two for selenium cells. 
Title: Alexander Graham Bell honors and tributes
Content: In the early 1970s, the UK rock group The Sweet recorded a tribute to Bell and the telephone, suitably titled "Alexander Graham Bell". The song gives a fictional account of the invention, in which Bell devises the telephone so he can talk to his girlfriend who lives on the other side of the United States. The song reached the top 40 in the UK and went on to sell over one million recordings worldwide. ; Another musical tribute to Bell, Alexander Graham Bell (2006) was written by the British songwriter and guitarist Richard Thompson. The chorus reminds the listener that "of course there was the telephone, he'd be famous for that alone, but there's 50 other things as well from Alexander Graham Bell". 
Title: Bell Homestead National Historic Site
Content:  call, proving that the telephone was useful not only over short distances. On a test call one week earlier on 3 August 1876, Alexander Graham's uncle, Professor David Charles Bell, spoke to him from the Brantford telegraph office, reciting lines from Shakespeare's Hamlet ("To be or not to be...."). The young inventor, positioned at the A. Wallis Ellis store in the neighbouring community of Mount Pleasant, listened to his uncle's voice emanating from his receiver housed in a metal box. Initially David Bell's voice couldn't be heard distinctly as "...all kinds and sizes of wire were used in stringing from the house to Mount Pleasant road". However, Walter Griffin, the 
Title: Alexander Graham Bell
Content:   Bell and his assistant Charles Sumner Tainter jointly invented a wireless telephone, named a photophone, which allowed for the transmission of both sounds and normal human conversations on a beam of light. Both men later became full associates in the Volta Laboratory Association. On June 21, 1880, Bell's assistant transmitted a wireless voice telephone message a considerable distance, from the roof of the Franklin School in Washington, D.C., to Bell at the window of his laboratory, some 213 m away, 19 years before the first voice radio transmissions. Bell believed the photophone's principles were his life's "greatest achievement", telling a reporter shortly before his death that the photophone was "the greatest invention [I have] ever made, greater than the telephone". The photophone was a precursor to the fiber-optic communication systems which achieved popular worldwide usage in the 1980s. Its master patent was issued in December 1880, many decades before the photophone's principles came into popular use.
Title: Elisha Gray and Alexander Bell telephone controversy
Content:  Alexander Graham Bell was a professor of elocution at Boston University and tutor of deaf children. He had begun electrical experiments in Scotland in 1867 and, after emigrating to Boston from Canada, pursued research into a method of telegraphy that could transmit multiple messages over a single wire simultaneously, a so-called "harmonic telegraph". Bell formed a partnership with two of his students' parents, including prominent Boston lawyer Gardiner Hubbard, to help fund his research in exchange for shares of any future profits. He experimented with many different possible transmitters and receivers from 1872 to 1876, created numerous drawings of liquid transmitters, and obtained 
Title: Telephone
Content:  Meucci, Johann Philipp Reis, Alexander Graham Bell, and Elisha Gray, amongst others, have all been credited with the invention of the telephone. Alexander Graham Bell was the first to be awarded a patent for the electric telephone by the United States Patent and Trademark Office (USPTO) in March 1876. Before Bell's patent, the telephone transmitted sound in a way that was similar to the telegraph. This method used vibrations and circuits to send electrical pulses, but was missing key features. Bell found that this method produced a sound through intermittent currents, but in order for the telephone to work a fluctuating current reproduced sounds the best. The fluctuating currents became the basis for the working telephone, creating 
Title: Invention of the telephone
Content: Baker, Burton H. (2000), The Gray Matter: The Forgotten Story of the Telephone, St. Joseph, MI, 2000. ISBN: 0-615-11329-X ; Bell, Alexander Graham. (1911), Speech by Alexander Graham Bell, November 2, 1911: Historical address delivered by Alexander Graham Bell, November 2, 1911, at the first meeting of the Telephone Pioneers' Association, Beinn Bhreagh Recorder, November 1911, pp. 15–19; ; Bethune, Brian, (2008) Did Bell Steal the Idea for the Phone? (Book Review), Maclean's Magazine, February 4, 2008; ; Bourseul, Charles, Transmission électrique de la parole, L'Illustration (Paris), August 26, 1854 ; Bruce, Robert V. (1990), Bell: Alexander Bell and the Conquest of Solitude, Cornell University Press, 1990. ISBN: 0-8014-9691-8 ; Coe, Lewis (1995), 
Title: Bell Homestead National Historic Site
Content:  of the deaf, spent a few weeks of leisurely contemplation and invented the telephone." The stamp depicts three telephones of various time periods, including his famous Gallows model, considered the world's first telephone. In 1915 Alexander Graham referred to it saying "The instrument, just as you see it here, was invented in the summer of 1874, during a visit I paid to my father and mother in Brantford..." As well, one of the first successful voice transmission of any notable distance (6 km) was made on 4 August 1876, between the telegraph office in Brantford, Ontario and Melville House over makeshift wires.

Question: what else did alexander graham bell invent other than the telephone?
Answer: Graphaphone.