HD-4 or Hydrodome number 4, was an early research hydrofoil watercraft, developed by which scientist, who was a Scottish-born scientist, inventor, engineer, and innovator who is credited with patenting the first practical telephone, and founding the American Telephone and Telegraph Company (AT&T), in 1885?
HD-4: HD-4 or Hydrodome number 4 was an early research hydrofoil watercraft developed by the scientist Alexander Graham Bell.
i don't know