Sorry to break it to you, but there's no such thing as an original idea. To put it simply and controversally, God is the true source of any idea. Us humans, are the vessel in which we are able to bring these 'inventions' or ideas into physical fruition. However, for those who need a scientific explanation, or perspecive rather, this is known as multiple discovery.
Have you ever had a great idea as a kid, and then by the time you grew up some adult "stole" your idea?
The universal concious mind plays an extesive role in this phenomenon.
Do some research and see for yourself! <3