An Invention Assignment Agreement is a legal contract that transfers ownership of an invention, including all associated patent rights, from the inventor (assignor) to another party (assignee), typically an employer or commissioning entity. Under United States patent law, inventions are initially owned by the individual inventor as established in 35 U.S.C. Section 101, regardless of whether the invention was created during employment or using the employer's resources. An assignment agreement is therefore necessary to vest ownership in the employer or other party.

The legal framework for patent assignments is found in 35 U.S.C. Section 261, which provides that patents and patent applications are assignable by an instrument in writing. The assignment must be recorded with the United States Patent and Trademark Office (USPTO) to provide constructive notice to third parties. Under 37 C.F.R. Section 3.1, an assignment is the transfer of the entire right, title, and interest in a patent or patent application, distinguishable from a license which merely grants permission to practice the invention.

The enforceability of invention assignment agreements in the employment context is subject to important state law limitations. Several states, including California (Labor Code Section 2870), Delaware (19 Del. C. Section 805), Illinois (765 ILCS 1060/2), Minnesota (Minn. Stat. Section 181.78), and Washington (RCW 49.44.140), have enacted statutes that restrict employers from requiring assignment of inventions that employees develop entirely on their own time without using the employer's equipment, supplies, or trade secret information, and that do not relate to the employer's business or anticipated research.

An employer hires an engineer, scientist, or product developer and needs to ensure that inventions created within the scope of employment are owned by the company rather than the individual inventor. A company engages an independent contractor or consultant to develop a new product, process, or technology and must secure assignment of any resulting inventions.

A startup founder is assigning pre-incorporation inventions to the newly formed company as part of the initial capitalization, often in exchange for founder's equity. Two or more co-inventors need to assign their respective interests in a joint invention to a single entity for unified patent prosecution and commercialization.

A university researcher is transferring invention rights to the university's technology transfer office in accordance with the institution's intellectual property policy and the Bayh-Dole Act (35 U.S.C. Sections 200-212) requirements for federally funded research. A company is acquiring specific patented technology or pending patent applications from another company as part of a technology acquisition deal.

An inventor is assigning their patent rights to a family member, trust, or holding company for estate planning or asset protection purposes.

The invention description must be specific and comprehensive, identifying the invention by title, a detailed technical description, any associated patent application serial numbers, filing dates, and patent numbers if already issued. The description should be sufficient to identify exactly what is being assigned without ambiguity.

The assignment clause must contain clear, present-tense transfer language ("hereby assigns" rather than "agrees to assign") to effectuate an immediate transfer of rights. The scope should cover the invention itself, all patent applications (domestic and foreign), all patents that may issue, all divisions, continuations, continuations-in-part, reissues, and extensions, and all rights to claim priority under the Paris Convention.

Consideration must be specified. In the employment context, this may be the employment itself, salary, or a separate payment. For standalone transactions, the monetary consideration or other value exchanged must be stated. Adequate consideration is necessary for the agreement to be enforceable as a contract.

The assignor's cooperation clause should obligate the inventor to execute all documents, provide all testimony, and take all actions reasonably necessary to perfect the assignee's rights, including signing patent applications, declarations, and assignments for foreign filings. This obligation should expressly survive termination of any employment or consulting relationship.

Representations and warranties should include the assignor's confirmation that they are the sole inventor (or identifying all co-inventors), that the invention has not been previously assigned or encumbered, that no third party has rights in the invention, and that the assignment does not violate any prior agreement. Compliance with applicable state invention assignment statutes must be addressed, with appropriate exclusion language for protected personal inventions.

The agreement should include provisions for recording with the USPTO under 35 U.S.C. Section 261 and power of attorney for the assignee to execute documents on the assignor's behalf if the assignor becomes unavailable.