IP Assignment Agreement
A contract requiring employees to transfer ownership of inventions and creative work made during employment to the employer — often broader than employees realize.
An Intellectual Property (IP) Assignment Agreement — also called an Invention Assignment Agreement or Proprietary Information and Inventions Agreement (PIIA) — is a contract that transfers ownership of any intellectual property an employee creates during the course of employment to the employer. These agreements are near-universal at tech companies and are typically signed as a condition of employment during onboarding. Most employees sign them without reading them closely, which can create problems later.
The scope of these agreements is often broader than employees expect. Many IP assignment clauses claim ownership of any invention created: (1) using company equipment, (2) during working hours, (3) related to the company's current or anticipated business, or (4) resulting from work performed for the company — including combinations of the above. At their broadest, an employer could claim ownership of a side project you built at home on your own laptop if the project is tangentially related to the company's industry.
Several states — including California, Delaware, Illinois, Minnesota, North Carolina, and Washington — have laws limiting the scope of IP assignment agreements. California Labor Code Section 2870, for example, specifically exempts inventions that don't use company resources, aren't related to the company's business, and don't result from work performed for the employer. Understanding whether your state has similar protections is critical if you do any outside work or side projects.
What IP Assignment Agreements Typically Claim
- All work product created using company resources (computer, network, time).
- Inventions 'related to' or 'reasonably anticipated to be related to' the company's current or future business.
- Improvements to existing company technology, processes, or products.
- Creative works, code, designs, writing, and other copyrightable material produced during employment.
- Sometimes: inventions created outside work if they fall within the company's industry.
Protecting Your Side Projects
- Use your own equipment, your own internet, and your own time exclusively for side projects.
- Check your agreement for language about 'related to company business' — this is the most common trap.
- Some companies allow you to disclose side projects in writing — document it and get written approval.
- In California and similar states, the statutory carve-out protects most genuinely personal projects.
- If you have significant outside work at the time of hiring, negotiate an exclusion list before signing.
- Retain copies of all pre-employment work with timestamps to establish prior invention.
Example
A backend engineer joins a fintech startup and signs an IP assignment agreement without reading it. She has a personal project — a budgeting app — that she's been building in her spare time. Six months after joining, her startup's product pivots to include a budgeting feature. The IP assignment's 'related to anticipated business' clause creates ambiguity about whether her personal app is now company property. Had she listed the app as a 'prior invention' before signing, she would have been protected.