Helen Keller, Annie Sullivan, and Dr. Alexander Graham Bell.

• As a professor at Boston University begins experiments with the harmonic telegraph.
• With Thomas Watson, a mechanic and model builder, Dr. Bell focuses on the harmonic telegraph. First sound transmission heard on June 2nd, 1875.
• Both engineer the Gallows Telephone.
• Returns to his home in Brantford to write the patent specifications of his invention.
• February 14, 1876 - Gardiner Greene Hubbard (father-in-law) files a patent application on behalf of Dr. Bell.
• March 7th, 1876 - Patent No. 174,465 is granted to Dr. Bell.
• A.G.B. to Tom Watson (March 10th, 1876)
  "Mr Watson, come here. I want you."
  First one-way voice transmission over copper via a liquid transmitter.
• June 25th, 1876 - Demonstrates one-way voice transmission at the Philadelphia Centennial Exposition.
• On October 6th, 1876 completes first two-way telephone conversation with Thomas Watson in Boston, Massachusetts.
• Follows-up on October 9th, 1876 with a two-way conversation over a telegraph connection between East Cambridge and Boston.
• On July 9th, 1877 forms the Bell Telephone Company as an association.
• Members included: Thomas Sanders, Gardiner Hubbard (father-in-law) and Tom Watson
• One year later - the Bell Telephone Company is restructured as a corporation later to become American Telephone & Telegraph (AT&T). Theodore Vail hired-on as the first General Manager of the Bell Telephone Company.
• January 25th, 1915 - First "official" transcontinental telephone conversation.
    Alexander Graham Bell (New York) /
       Thomas Watson (San Francisco)
    A.G.B to Thomas Watson:
     "Mr. Watson, come here. I want you."
    Thomas Watson to A.G.B.:
    "It will take me five days to get there now."

• In early 1891 pursues interest in flight and begins experiments on Cape Breton in Canada.
• In 1894 develops and engineers wings and propellers at Baddeck.
• Four years later - Kite experiments begin.
• In 1901 - Triangular prism box-kite takes flight at Baddeck.
• Develops tetrahedral (4 triangular sides) Kite.
• In 1906 - shifts focus to the Hydrofoil.
• In 1907 - Mabel Bell funds the Aerial Experiment Association.
  Members include: Thomas Selfridge, Casey Baldwin, Glenn Curtiss and Douglas McCurdy.
• In 1907 - Cygnet I - an unmanned Tetrahedral Kite - takes flight.
• In 1907 - Thomas Selfridge unsuccessfully pilots Cygnet I.
• 1907 through 1918 - Spends most of his time at Cape Breton working with Casey Baldwin and others on aerial/hydrofoil projects. Their work culminates in a new world speed record of 70.86 set by the HD4. The year was 1919.

• In 1871 - Dr. Bell leaves Brantford home to teach at Boston University. His thoughts and efforts focus on deaf children.
• In 1879 - Dr. Bell invented the audiometer which was employed to identify school children with hearing impairments.
• In 1883 - Dr. Bell opens a school for children in Washington, DC. The focus is on the deaf-child but no child is rejected.
• In 1885 - Dr. Bell is forced to close his school because of recurring patent litigation costs. Some 500+ claims were filed against him over the years, all of which were successfully defended.
• In 1887 - a father visits Dr. Bell and introduces his daughter - Helen Keller.
• On recommendation of Dr. Bell - Anne Sullivan from the Perkins School for the Blind becomes Helen Keller's teacher. And so begins a lasting friendship between all three.
• In 1888 - Dr. Bell along with his father-in-law and others, found the National Geographic Society.
• In 1890 - Dr. Bell completes the first nationwide census of the deaf in the United States.
• In 1890 - Dr. Bell and others set up the American Association for the Promotion of the Teaching of Speech to the Deaf.
  Helen Keller said of Dr. Bell:
  "He is never quite so happy as when he has a little deaf child in his arms."

• Doctor of Philosophy.
• Doctor of Science.
• Doctor of Medicine.

• His mother, Eliza, was deaf. She taught him the Finger Alphabet.
• His wife, Mabel, was a student at the Clarke School where Dr. Bell taught Visible Speech. She, too, was deaf.
• His father, Alexander Melville Bell was an educator and lectured at the University of London.
• In 1898 - Dr. Bell became President of the National Geographic Society.
• The "bel" in Decibel was named in honor of Dr. Bell.
• Nicknames: Aleck, Alec or Alex.