In 1879, the same year Swan filed and was awarded his patent in England, Thomas Edison decided to turn his attention to the development of electric light bulbs. Edison, ever the keen businessman, wanted to develop a commercially viable and practical version to bring to market.

He hoped to muscle in on the lucrative gas and oil lighting market in the United States. If he could break the hegemony of these two systems, he might just be able to make a fortune. In October of 1879, he finally patented his first application for an "Improvement in Electric Lights" with the patent office. But he didn't stop there.

Edison continued to work on and refine his designs. He experimented with different n 1879, Edison filed another patent for an electric lamp that used "a carbon filament or strip coiled and connected ... to platina contact wires." This solution sounds very similar to that of Joseph Swan almost 20 years prior.

This patent also described the possible means of created said carbon filament. These included the use of "cotton or linen thread, wood splints, and papers coiled in various ways."

Just a few months after his later patent, Edison and his team were able to discover that carbonized bamboo did the trick. This material appeared to be able to last for well over 1200 hours.

This discovery marked the beginning of commercially manufactured light bulbs and in 1880, Thomas Edison’s company, Edison Electric Light Company began marketing its new product.

Impressive, but all was not plain sailing.

So similar was Edison's own invention that Swan decided to sue Edison for copyright infringement. The courts in Swan’s native Britain backed Swan’s claim to the bulb, allowing Edison to sell bulbs there only if he joined forces with Swan. And while Edison’s thinner rod made the difference at first, it was soon Swan’s cellulose rod that truly won the day and became the industry standard that would bring light to the world.

British courts ruled against Edison and as punishment Edison had to make Swan a partner in his electric company.

In 1883 the Edison & Swan United Electric Light Company was established. Known commonly as "Ediswan" the company sold lamps made with a cellulose filament that Swan had invented in 1881. Variations of the cellulose filament became an industry standard, except with the Edison Company. Edison continued using bamboo filaments until the 1892 merger that created General Electric -- and that company then shifted to cellulose.

Later, even the U.S. Patent Office decided in 1883 that Edison’s patent was invalid, as it also duplicated the work of another American inventor. But, despite all this, Edison would forever be remembered as the inventor of the light bulb.