However, it is not absolute to make samples like inventions, but there are exceptions. Generally speaking, the required samples account for the vast majority.
Mainly product invention patents and method invention patents.
It is necessary to apply for a patent for a product. For example, you can't apply for an idea for a new product, which is clearly stipulated in the patent law. If there is a new product, it is no problem to apply for a patent.
However, some method invention patent applications do not necessarily require samples.
Such as perming hair and dyeing hair. Disinfection, sterilization and other methods do not require samples.