Complete and submit an Technology Disclosure Form for any discovery you believe is new, useful, and non-obvious to one "skilled in the art"; that is, knowledgeable of the publically available information that would enable the practice of your invention.
Inventorship has a strict legal meaning under US law. Only persons who have independent, conceptual contributions to an invention (and/or its reduction to practice) are legal inventors. So, for instance, one who is carrying out the instructions of another is not considered an inventor. Note also that the authors of a published paper may not be the same as the inventors. An invention must be patented in the name of exactly all its legal inventors, that is, without including any unqualified person nor excluding any qualified person. Incorrect determination of inventors is a basis for invalidating a patent.
Invention disclosures often report work in which more than one person has participated. In such cases, legal principles are used to determine which of such co-workers qualify as legal co-inventors. The most important consideration in determining inventorship is initial conception of the invention. The courts have ruled that unless a person contributes to the conception of the invention, that person did not make an inventive contribution, and is not an inventor. Conception has been defined as "the formation in the mind of the inventor of a definite and permanent idea of the complete and operative invention as it is thereafter to be applied in practice". An invention is complete and operative "if the inventor is able to make a disclosure which would enable a person of ordinary skill in the art to construct the apparatus without extensive research or experimentation". This is called "enablement". In practice, the conceptual contributions which make up an invention typically consist of several inventive steps, possibly contributed by different persons.
In the patent application, each claim represents one of the essential conceptual elements which make up the invention. The legal test of inventorship is whether a co-worker has made an original, conceptual contribution to at least one of the claims of the patent.
For practical purposes in making an invention disclosure, include those who seem to qualify as inventors based on the foregoing information, understanding that the final determination will be made in consultation with patent counsel if a patent application is filed.
If you need to disclose information about your invention to potential licensees, consider providing a copy of the patent application without the enabling claims included.