Under Section 10(5) of the Patents Act, 1970, the claim or claims of a complete specification shall:

Section 10(5) of the Patents Act, 1970 requires the claims of a complete specification to relate to a single invention, or a group of inventions linked so as to form "a single inventive concept", to be clear and succinct, and to be fairly based on the matter disclosed. Several claims are allowed, but unrelated inventions cannot be combined.