The logo illustrates some of Edison’s most famous inventions including the electric light bulb, phonograph, and the motion picture camera. Edison holds over 1,000 U.S. patents and is the most ...

The incandescent light bulb, perfected for mass use by Thomas A. Edison in the late 19th century, is being supplanted by fluorescent lighting that is more efficient and longer lasting.

A new light bulb efficiency law goes into effect January 1. Thomas Edison’s great grandson says the inventor would have fully embraced it.

In 1883, Edison lost his light bulb patent when the U.S. Patent Office ruled his work had been based on that of another inventor, William Sawyer. After a number of court hearings, that ruling ...

Edison Light Bulb, 1879 Thomas Edison used this carbon-filament bulb in the first public demonstration of his most famous invention—the light bulb, the first practical electric incandescent lamp. The ...

Their light bulbs burned out after 150 hours, but Edison improved that to 400 hours by 1884, and 1,200 hours by 1886. Edison and Swan sued each other for violating each other's patents.

Thomas Edison's incandescent light bulb, patented in 1880, made electric lighting practical, affordable, and long-lasting. It completely transformed homes, cities, and industries worldwide, going ...

A box containing 23 light bulbs used at the 1890 court case where Thomas Edison defended his patent for the invention is to be auctioned later this month and is expected to fetch up to 300,000 ...

For Thomas Edison, the answer to the question of who invented the light bulb was easy. He held the patents, so he invented it. And strictly speaking, he was correct.