Intangible assets. Approval document refers to the document approving an application and is an intangible asset. Intangible assets refer to identifiable non-monetary assets that have no physical form. Intangible assets can be divided into broad and narrow senses. Intangible assets in a broad sense include financial assets, long-term equity investments, patent rights, trademark rights, etc. Since they do not have physical entities, they are expressed as certain legal rights or technologies.