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Introduction to Patents
Glossary of Patent Terms
Invention Disclosure
Patent Related Links

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11. What are claims?

Claims are the most important part of a patent. They are the legal words in the patent which specifically describe what is patented, much as a legal property description defines the boundaries of real property. The drawings and disclosure of a patent only exist to support the claims. A typical patent application contains about twenty claims. The PTO charges an additional per claim fee to examine over twenty claims, and over three independent claims.

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