if you refer to applying for a new patent with multiple existing product combinations, it is a combined invention patent. Whether you can apply for a patent depends on whether the technical effects of several product combinations can support each other. If it is only a simple structural combination, you cannot apply for a patent.
for example, adding an eraser to the tail of a pencil needs to be used alternately at work, and the combination can achieve the functions of being convenient for users to use and carry. At this time, the combination is creative and practical, and you can apply for a patent.
On the other hand, if you add something unrelated to the pencil, such as an electronic watch and a thermometer, it is not practical and you cannot apply for a patent.
structural combination patents can be applied for both invention patents and utility model patents. Invention patents have higher requirements for creativity, while utility models have lower requirements for creativity and more emphasis on practicality.