What actions should I take if I believe someone has infringed on my patent?

1. Consult with an attorney: The first and most important step is to consult with a patent attorney who can evaluate your case and advise you on your legal options.
2. Conduct an investigation: Conducting an investigation is essential to determine whether your patent has been infringed upon. An attorney can help you investigate and determine whether the alleged infringer is using, selling, or manufacturing a patent infringing product or process.
3. Issue a cease and desist letter: Once infringement has been confirmed, the next step is to issue a cease and desist letter to the alleged infringer requesting them to immediately stop all activities that infringe on your patent rights. A cease and desist letter can be drafted by your attorney to ensure it is legally effective.
4. Negotiate a settlement or license agreement: After a cease and desist letter has been issued, the alleged infringer can decide to settle the case or negotiate a license agreement to use the patent legally upon payment of royalties.
5. File a lawsuit: If the infringer does not comply with the cease and desist letter or refuses to negotiate, you may need to file a lawsuit against them. An experienced patent attorney can represent you in pursuing a lawsuit for patent infringement in court.

It is worth noting that patent litigation can be complex and expensive depending on your jurisdiction. It is important to consult a patent attorney who has the requisite technical and legal knowledge to advise on the best course of action. Additionally, there may be exceptions to patent infringement based on fair use or other exceptions, and an attorney can help you understand how these may apply to your case.