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1. Previous Correspondence: Reference to any previous attempts to resolve the matter, used when there has been prior communication

2. Willful Infringement: Discussion of evidence showing the recipient's prior knowledge of the patent, included when such evidence exists

3. Settlement Terms: Proposed terms for resolution without litigation, included when the patent holder is open to immediate settlement

4. Reservation of Rights: Statement reserving additional legal rights and remedies, used in more formal or serious cases

5. Confidentiality Notice: Statement regarding the confidential nature of the communication, used when sensitive information is included

1. Patent Documentation: Copies of relevant patent certificates and documentation

2. Evidence of Infringement: Photographs, technical documentation, or other evidence of the alleged infringement

3. Prior Communications: Copies of any relevant previous correspondence between the parties

4. Market Evidence: Documentation showing the impact of the infringement, such as sales data or market analysis