2. • Morse code is a method of transmitting textualinformation as
a series of on-off tones, lights, or clicks that can be directly
understood by a skilled listener or observer without special
equipment.
A related but different code was originally created for Samuel
F. B. Morse's electrictelegraph by Alfred Vail in the early
1840s.
3. • The phonograph was invented in 1877
by Thomas Alva Edison at his laboratory
in Menlo Park, New Jersey,
USA.[218][219][220][221] On February 8, 1878,
Edison was issued the first patent (U.S. patent
#200,521) for the phonograph.[222]
4. • The flexible flyer was invented in 1889 by
Philadelphia resident Samuel Leeds
Allen.[271]U.S. patent #408,681 was issued to
Allen on August 13, 1889.[272]
5. • The earliest electric guitar, known as
a "frying pan", was a hollow bodied
acoustic instrument with tungsten steel
pickups invented byGeorge
Beauchamp and Adolph Rickenbacker in
1931. The electric guitar was a key
instrument in the development of musical
styles that emerged since the late 1940s,
such as Chicago blues, earlyrock and
roll, rockabilly, and 1960s blues rock.
Electric guitars are used in almost every
popular music genre
6. • Cooking food with microwaves was
discovered by Percy Spencer on October 8,
1945, while building magnetrons for radar
sets at Raytheon. Spencer was working on an
active radar set when he noticed a strange
sensation, and saw that a peanut candy bar he
had in his pocket started to melt.
