The kinds of agreements involved
Assignments transfer ownership and must be in writing to be effective. Licenses grant permission to use while the owner keeps title, and they can be exclusive or nonexclusive, limited to a territory, or confined to a field of use. Joint development agreements decide in advance who will own inventions that come out of shared work, and invention assignment clauses in employment and consulting contracts do the same for individual inventors. Wording matters more than people expect: language that presently assigns future inventions is often treated differently from a mere promise to assign later, and that difference can surface years afterward in a title dispute.
Terms that tend to be fought over
Royalty provisions cause many disagreements, especially when the base is a bundle of products and only some features use the patent. Under US law, royalties for use of a patent after it expires generally cannot be collected, so agreements that combine patents with know-how or other rights need careful structure. Enforcement clauses decide who may sue infringers and who controls that litigation, which affects whether an exclusive licensee can bring a case. A licensee may in many situations challenge the validity of the licensed patent, and agreements often address what happens if it does. Termination, assignment of the agreement itself, and treatment in a bankruptcy round out the list of recurring issues.
Reviewing or drafting one
Bring the full agreement, including schedules, amendments, and side letters, along with the patent numbers and any related applications. For a new deal, a short description of the commercial goal tells us which terms deserve the most attention. For an existing agreement, an account of what has gone wrong helps us read the contract against the facts rather than in the abstract. Recordation of assignments with the USPTO is worth checking, because unrecorded transfers can create problems with later buyers. A first meeting usually ends with a list of the provisions that carry the most risk and a view on whether renegotiation, a clarifying amendment, or a firmer position makes sense.
