Battery:
In 1880, Italian physicist Volta made the world's first battery.
In 1860, Planté of France invented a battery using lead as the electrode.
In 1887, Englishman Helleson invented the earliest dry battery.
Telephone:
In 1876, Bell invented the magnet telephone and filed a patent application for it. On the same day, Gray, who invented the liquid telephone, also filed a patent application. A lawsuit over the rights to the invention of the telephone began and lasted for more than ten years. In the end, the court awarded Bell the right to invent the phone, based on the fact that Bell's magnet phone was different from Gray's liquid phone and that the patent application had been filed hours before Gray's.
TV:
p>In 1924, the British Baird invented the most primitive television.
American RCA launched the world's first black-and-white television in 1939, set the national color television standard in 1953, and launched RCA color television in 1954.
Electric motor:
1834 German Jacobi invented the DC engine
1888 Yugoslav-American Tesla invented the AC motor
Generator :
In 1831, Faraday built the first generator prototype
In 1832, inspired by Faraday’s discovery, the Frenchman Pixie applied the principle of electromagnetic induction to create the first power generation machine.
Refrigerator:
In 1913, the world's earliest household refrigerator was developed in Chicago, USA. This kind of refrigerator called "Dumeer" brand has a wooden shell and a compression refrigeration system installed inside, but the effect is not ideal.
In 1918, engineer Coberlandt of the American KE-LVZNATOR company designed and manufactured the world's first mechanical refrigeration household automatic refrigerator.
In 1834, American engineer Jacob Perkins invented the world's first compression refrigeration device, which was the prototype of the modern compression refrigeration system. In the same year, Perkins received the first freezer patent issued in the United Kingdom.
Electric light:
In 1879, American Edison invented the first practical electric light. The era of oil lamps, candles, and arc lamps has ended, and mankind has entered the "Age of Light" in a true sense.