Which is the weather satellite ?
Trios-I
Who invented the polaroid camera ?
E H Land
Who developed the first electric shaver ?
Schick
Who invented the telephone ?
Alexander Graham Bell
Who invented cellophone?
John Larson
Who invented the safety match?
Landstrom
Who is the inventor of the railway engine ?
Richard Trevithik
Who is the inventor of printing press ?
Johaan Guttenberg
Who discovered X-ray ?
W K Roentgen
Who discovered the unit of electrical inductance ?
Joseph Henry


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