An entity that uses the moniker "God" , and according to Bishop Ussher, on October 23, 4004 BCE [as based on the proleptic Julian calendar]Just the name and dates.
This is like asking 'who invented a lack of belief in astrology?' Atheism is a lack of a belief in gods. The lack of belief in gods probably goes back to the beginning of recorded history - there have always been skeptics.Just the name and dates.
Can't cough up facts?If the OP was asking who the first recorded atheists were*, he would find the answer in Wikipedia's article on the history of atheism.
"In the East, a contemplative life not centered on the idea of deities began in the sixth century BCE with the rise of Indian religions such as Jainism, Buddhism, and various sects of Hinduism in ancient India, and of Taoism in ancient China. Within the astika ("orthodox") schools of Hindu philosophy, the Samkhya and the early Mimamsa school did not accept a creator deity in their respective systems. 
"Philosophical atheist thought began to appear in Europe and Asia in the sixth or fifth century BCE."
* - He is of course not asking this, but what he is asking is very silly, so we might as well take the opportunity to learn something.
Do you know any historians?An entity that uses the moniker "God" , and according to Bishop Ussher, on October 23, 4004 BCE [as based on the proleptic Julian calendar]
If, as some Christians believe, God created everything then God created the human capacity for thought and therefore the capacity for doubt in His/Its/Her existence.
Irrational atheist deflection.who invented Satan?
King James isn't the author of the story.Irrational atheist deflection.
You should have the answer.
King James Version
44 Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it.