Alexander Graham Bell his grandchildren. "U.S. patent images in TIFF format" Alexander Graham Bell Alexander Graham Bell (March 3, 1847 – August 2, 1922) was a Scottish-born scientist, inventor, engineer, and innovator who is credited with inventing and patenting the first practical telephone. He also 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
Disclosure of the invention under the European Patent Convention patent application as filed, consisting in an insufficient identification of the subject-matter claimed, cannot subsequently be cured without offending against Article 123(2) EPC which provides that the subject-matter content of a European patent application as filed may not be extended. An insufficiently clear and complete disclosure of the invention is a ground of opposition, and revocation. Although the European Patent Convention does not exclude the patenting of "revolutionary" inventions,<ref name="T 1329/07"> Decision T 1329/07 of the Technical Board of Appeal 3.4.02 of 11 November 2010, point 2.2.3</ref> The burden of proof generally lies upon an opponent to establish insufficiency of