Lets just finalize this once and for all. No one answer that name Satoshi Nakamoto, this is a name created by group of individuals and used the name as the owner of Bitcoin to divert the world attention because they know if their invention succeed, government might jail them.

Now back to inventory/creation, its very hard for only one person to create without the help of others (group). But one person can initiate an ideal and then form a group. E.g. God = three persons, Banks=group of individuals, etc.

Back to Bitcoin, the person who brought bitcoin is Finney, he first received the bitcoin and he brought the double spend idea also. He then form group and i believe they brought the idea of the name Satoshi Nakamoto due to fear of government. I remember liberty reserve, egold, ebullion these are online currencies that existed before bitcoin and died because the owner of liberty reserve was arrested by FBI. Since then ecurrencies suffered. I believe this security issue brought the anonymity to these group that invented bitcoin money.