Invention Assignment Laws in Massachusetts: Who Owns What You Create

Federal law does not provide a uniform framework governing invention ownership between employers and employees. The general common law rule, adopted by most states, is that employers own inventions created by employees if they were hired to invent, if the invention was made using company resources or during work time, or if the invention relates to the company's actual or reasonably anticipated business. Patent law under 35 U.S.C. governs the rights to patented inventions once created, but does not determine ownership between employer and employee—that is left to state law and employment agreements.

The Defend Trade Secrets Act (18 U.S.C. § 1836) allows employers to protect trade secrets and confidential information nationally, but does not automatically vest ownership of inventions in the employer. Federal employment discrimination law (Title VII, ADA, ADEA) does not address invention assignment directly.

Employers may use invention assignment agreements under the Uniform Trade Secrets Act framework, which most states have adopted. However, these agreements are subject to state-law limitations on reasonableness and enforceability. The federal Defend Trade Secrets Act includes a whistleblower immunity provision (18 U.S.C. § 1833(b)) that protects disclosure of trade secrets, including inventions, to government officials or in court filings under seal, even if an assignment clause prohibits such disclosure.

Massachusetts General Laws Chapter 149, Section 24L establishes strong protections for employee inventions and significantly limits employer ownership claims compared to federal common law. Under Section 24L, an employer can claim ownership of an invention only if: (1) the invention was developed entirely using the employer's equipment, supplies, facilities, or trade secret information; (2) the invention was developed entirely on the employer's time; or (3) the invention relates at the time of its development to the employer's actual or demonstrably anticipated business or research.

Critically, Section 24L prohibits employers from claiming ownership of inventions made entirely on the employee's own time, without using any company resources, unless the invention relates to the company's business and was created as a result of employment-related activities or knowledge. Even then, the statute provides that employees retain rights to inventions developed outside the scope of these three categories.

Massachusetts law requires written notice: employers must provide written notice to employees, either in an employment agreement or other writing before employment begins, of any company policy regarding invention assignment. If an employer fails to provide this notice, the employee retains ownership of the invention regardless of when or where it was created.

Section 24L also invalidates non-compete agreements and related IP clauses that are unreasonable in duration, area, or type of restricted business. Massachusetts courts apply a strict reasonableness test to these provisions. Additionally, Massachusetts General Laws Chapter 149, Section 24 explicitly limits non-compete and invention assignment agreements to reasonable time periods, geographic areas, and business restrictions. Violations of these requirements may be challenged as unfair practices under Chapter 93, Section 5.

The state law applies to all employers and employees doing business in Massachusetts. Massachusetts courts have held that unreasonable invention assignment clauses are unenforceable as against public policy, and Section 24L's protections cannot be waived by the employee. This means an employment contract requiring assignment of all inventions, including those made on personal time with personal resources, is void and unenforceable in Massachusetts.

Massachusetts law provides several important exceptions to employer invention ownership claims. First, inventions made entirely on personal time with personal resources are never owned by the employer unless they directly relate to the employer's actual or demonstrably anticipated business and the employee created them as a result of employment-related knowledge or activities. Second, employers cannot claim ownership of inventions if they fail to provide written notice of their invention assignment policy before employment begins; failure to give notice voids the employer's rights.

Third, invention assignment clauses that are unreasonable in scope, duration, or geographic area are unenforceable under Massachusetts General Laws Chapter 149, Section 24. Overly broad clauses attempting to assign all inventions, including those entirely outside the company's business, will be struck down by Massachusetts courts.

Fourth, inventions made by employees hired for purposes other than inventing may fall outside the employer's scope of control, even if created during work hours, if they are wholly unrelated to the employer's business. However, this exception is narrow; if the invention relates to the company's actual or reasonably anticipated business, the employer's claim is stronger.

Fifth, the Defend Trade Secrets Act's whistleblower immunity provision (18 U.S.C. § 1833(b)) allows employees to disclose trade secrets and confidential inventions to government officials or in court filings under seal without violating invention assignment or confidentiality agreements. Massachusetts courts recognize this federal immunity.

Sixth, public policy exceptions may apply if enforcing an invention assignment would prevent an employee from earning a livelihood or would be unconscionable. Massachusetts courts apply equitable defenses to invention assignment disputes. Additionally, invention assignment clauses that operate as unlawful non-competes are void; Massachusetts strictly construes these provisions and will not enforce them if they effectively prevent an employee from working in their field.

Step 1: Document Everything. Keep detailed records of when and where you created the invention, what resources you used (personal computer, personal equipment, company supplies, etc.), when you created it (work hours or personal time), and whether it relates to your employer's business. Save emails, code repositories with timestamps, design files, lab notebooks, meeting notes, and any written communications about your invention. Document whether your employer provided written notice of an invention assignment policy before you were hired, and if so, preserve that notice.

Step 2: Internal Complaint and Demand. Review your employment agreement and any invention assignment clause carefully. If your employer is claiming ownership of an invention you believe belongs to you under Massachusetts law, send a written demand letter to your employer (preferably to HR and legal) explaining why you believe the invention falls outside the scope of their ownership claim under M.G.L. c. 149, § 24L. Cite the three categories where the employer can claim ownership (company resources, work time, or related to actual/anticipated business) and explain which do not apply to your invention. Request written acknowledgment that you own the invention. Keep copies of this correspondence.

Step 3: File a Complaint with the Massachusetts Attorney General or Consult an Attorney. If your employer refuses to acknowledge your ownership rights or threatens you with legal action, you have several options. You can file a complaint with the Massachusetts Attorney General's Office under Chapter 93, Section 5 (unfair and deceptive practices) alleging that your employer's invention assignment clause violates Massachusetts law. The AG's office URL is mass.gov/ago; you can file a consumer complaint online or by mail at One Ashburton Place, Boston, MA 02108. Alternatively, and ideally, consult an employment attorney licensed in Massachusetts who specializes in intellectual property disputes. An attorney can review your specific situation, assess the enforceability of your assignment clause, and advise whether to pursue state court litigation or negotiation.

Step 4: State Court Litigation (if necessary). If negotiation and regulatory complaints fail, you or your attorney may file a declaratory judgment action in Massachusetts state court (Superior Court or, if the amount is small, District Court) seeking a declaration that you own the invention and that your employer's assignment clause is unenforceable as unreasonable under M.G.L. c. 149, § 24. The court will examine whether the clause meets the Section 24L requirements and whether it is reasonable in scope and duration. You will need to present evidence (documents, emails, testimony) showing when and where you created the invention, what resources you used, and whether it relates to the company's business. Massachusetts courts apply a strict reasonableness standard and often rule in favor of employees when assignment clauses are overbroad.

Step 5: Consult an Attorney Immediately if Your Employer Takes Adverse Action. If your employer retaliates against you (firing, demotion, harassment, blacklisting) for claiming ownership of your invention, refusing to assign it, or reporting the violation to the Attorney General, this may constitute wrongful termination or retaliation under Massachusetts law. Consult an employment attorney immediately. Retaliation claims are strong in Massachusetts if you engaged in protected activity (reporting a violation of law, asserting your statutory rights under Chapter 149). Your attorney can pursue a wrongful termination claim, a retaliation claim under Chapter 93, or both, seeking damages for lost wages, emotional distress, and punitive damages.