Ownership
In most countries, both natural persons and corporate entities may apply for a patent. The entity or entities then become the owners of the patent when and if it issues. However, it is nearly always required that the inventor or inventors be named and an indication be given on the public record as to how the owner or owners acquired their rights to the invention from the inventor or inventors.
In the United States, however, only the natural person(s) (i.e. the inventor/s) may apply for a patent. If a patent issues, then each person listed as an inventor owns the patent separately from the other. For example, if two inventors are listed on a patent, then each one may grant licenses to the patent independently of the other, absent an agreement to the contrary.
It is common in the United States for inventors to assign their ownership rights to a corporate entity.[3] Inventors that work for a corporation, for example, often are required to assign their ownership rights to their corporation as a condition of their employment. Independent inventors often assign their ownership rights to a single entity so that only one entity has the right to grant a license.
The ability to assign ownership rights increases the liquidity of a patent as property. Inventors can obtain patents and then sell them to third parties. The third parties then own the patents as if they had originally made the inventions themselves
Application and prosecution
Main articles: Patent application and Patent prosecution
A patent is requested by filing a written application at the relevant patent office. The application contains a description of how to make and use the invention that must provide sufficient detail for a person skilled in the art (i.e., the relevant area of technology) to make and use the invention. In some countries there are requirements for providing specific information such as the usefulness of the invention, the best mode of performing the invention known to the inventor, or the technical problem or problems solved by the invention. Drawings illustrating the invention may also be provided.
The application also includes one or more claims, although it is not always a requirement to submit these when first filing the application. The claims set out what the applicant is seeking to protect in that they define what the patent owner has a right to exclude others from making, using, or selling, as the case may be. In other words, the claims define what a patent covers or the "scope of protection".
For a patent to be granted, that is to take legal effect in a particular country, the patent application must meet the patentability requirements of that country. Most patent offices examine the application for compliance with these requirements. If the application does not comply, objections are communicated to the applicant or their patent agent or attorney and one or more opportunties to respond to the objections to bring the application into compliance are usually provided.
Once granted the patent is subject in most countries to renewal fees to keep the patent in force. These fees are generally payable on a yearly basis, although the US is a notable exception
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