For what does the world owe Almon Strowger a debt of gratitude ?
Correct answer: C. Automatic Telephone Exchanges
- A. Parking Meters
- B. Vending Machines
- C. Automatic Telephone Exchanges
- D. None of the above
Explanation
Almon Strowger patented the automatic telephone exchange, which allowed calls to be connected without a human operator. This invention is the basis of automatic telephone switching.
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About Inventions and Discoveries
Inventions and Discoveries covers the people, dates, principles and practical uses behind developments such as the wheel, printing press, telephone, electricity, radio, computer, internet, vaccines and space technology. It distinguishes an invention, which creates a device or process, from a discovery, which identifies something already present in nature.
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