Thomas Edison received such a patent, only to have it revoked, along with all of his other light-bulb patents, when it was discovered he had stolen the invention from the works of others.
thomas Edison
Incandescent Electric Light Bulb
At the time of the light bulb's invention, the term of protection on a patent was 17 years.
Lewis Howard Latimer, the only African-American member of Thomas Edison's laboratory staff, patented a carbon filament for light bulbs.
Every invention has multiple patents often by many different people. Each patent covers different parts of the invention, improvements to the invention, or even effectively useless changes to the invention that allow an inventor to extend their patent coverage.
Thomas Edison. However, all of his light-bulb patents were revoked by the patent office when it was discovered he had stolen the ideas from other earlier inventors.
If you conceive an invention that happens to be an improvement upon something already patented, you can certainly pursue your own patent on the improvement invention, assuming it is new and non-obvious in light of everything ever used in public or described in any publication in any language anywhere in the world at any time prior to your patent filing date.
He was one of several people who invented a form of light bulb. His patent never amounted to much as his invention was flawed and burned out much too quickly.
I don't know what light celluar concrete is, but I do know that you cannot patent something that's already public. A patent for intellectual property is good for 20 years. Once the 20 years is up it's public knowledge. OOPS...I think I meant "utility " patent.
The turn signal was invented by Percy Douglas-Hamilton. In 1907, he applied for a patent, which was received in 1909.
A patent protects intellectual property, preventing other people from making, using, selling and importing an invention for a limited period of years.
Any answer to this question is going to be a matter of OPINION. In my opinion, his greatest Contribution to the modern world was the "Perfection" of the Incandescent Light Bulb. He did not invent the light bulb, but bought the Patent and made it a practical invention by finding a long lasting Filament and Atmosphere inside the bulb.The light bulb was a huge advancement to Civilization.
The incandescent light bulb,Another Answer:Actually Edison did NOT invent the Incandescent Light Bulb, he bought the original Patent, and then LATER improved the Filament, so that it become a longer lasting, more reliable product.