The claims are a set of sentences that define the legal boundary of the scope of the invention. Each claim must be a single sentence.
There are normally two types of claims: independent claims, and dependent claims. An independent claims is a self-sufficient sentence that describe an embodiment of the invention. A dependent claim must dependent upon an independent claim. It “inherits” all features of the independent claim it depends upon and adds some more features. Therefore, a dependent claim is always narrower in scope than the independent claim it depends upon. Claims are the most important part of a patent document because it defines the legal boundary. All infringement and invalidity lawsuits are centered around the meaning and scope of the claims in question.
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