what did john logie baind invent
1817
The patent expiration date for a specific invention is typically calculated 20 years from the filing date of the patent application.
The date the inventor received exclusive right to his invention..
December of 1981
The book Edison the Firefly and the Invention of the Light Bulb is copyright 2008.
2011 was the date of invention
It was invented in the 1500's.
December 21, 1891 I think...
Get a life you should know this
whe was blue ray invented
Gunpowder was formulated in the 9th century by Chinese alchemists
No exact date, however, it was first used in China when they invented gun powder.