What does it mean to apply for fee waiver?

Request to reduce patent fees such as application fees. When applying for a patent, you can apply for a fee reduction, that is, you can request to reduce the application fee, the substantive examination fee for an application for a patent for invention, the annual fee (within six years from the year when the patent right is granted), the reexamination fee and other patent fees. Patent literally refers to exclusive rights and interests. The word "patent" comes from Latin Litteraepatentes, which means open letters or open documents.