It is worth noting that the granting of the patents still remains in control of the national or regional patent offices. This is due to the fact that there is no universal patent law, and each nation has different legal standards for granting patents as well as enforcing them.
…I can vindicate my rights without having to register it” – is not correct. This method is known as the “poor man’s rule,” and proposes that if one encloses in a copy of, for example, a guitar composition recorded on a disc, and mails it to his or herself and does not open the envelope, this will evidence, by the postal stamp, the date of the work’s creation.
Once the application is submitted, a rigorous evaluation by USPTO officials follows, to certify that what you present as your “claim” in your application is useful, novel and non-obvious. It is also used to check that there is no current patent on it.
Applying for a patent can be viewed as a contract between inventors and the public (government) in which inventors, in exchange for making their invention public, are granted a limited monopoly over it.