Invention Assignment Laws in Florida: Who Owns What You Create

Federal law does not comprehensively regulate invention assignment. The primary federal framework is the patent system under 35 U.S.C., which vests initial patent ownership in the inventor unless transferred by written agreement. Courts apply the "shop rights" doctrine, which gives employers a non-exclusive, royalty-free license to use inventions created during employment using company resources, even without a written agreement. The Defend Trade Secrets Act (18 U.S.C. § 1836) protects trade secrets and provides civil remedies for misappropriation, but does not mandate invention assignment.

The federal Defend Trade Secrets Act preempts state trade secret laws and provides federal remedies for theft of proprietary information. However, federal law does not prohibit invention assignment clauses in employment contracts. The Federal Trade Commission and courts generally enforce invention assignment agreements if they are reasonable in scope and were agreed to knowingly. Many federal employees are subject to executive order and statute that vest certain inventions in the U.S. government, particularly those related to national defense or funded by federal grants.

Florida Statute 542.335 provides much stronger employee protections than federal law. This statute creates an affirmative legal bar to invention assignment in several key situations. First, employers cannot claim inventions developed entirely on the employee's own time, with the employee's own equipment and facilities, and at the employee's own expense, unless the invention relates directly to the employer's existing or demonstrably anticipated business.

Second, Florida law requires written notice before employment or before the invention is made. Specifically, section 542.335(1) states that an employer cannot require an employee to assign inventions unless the employer provides written notice that inventions made by the employee may be assigned to the employer. This notice must be provided in writing before or at the time of employment, or before the invention is conceived. If the employer fails to provide this written notice, any invention assignment restriction is void and unenforceable.

Third, the statute protects inventions that do not relate to the employer's business. Even if an invention is made during working hours or with company equipment, the employer cannot claim it if it is unrelated to the company's existing or reasonably anticipated business activities. This goes significantly further than federal law, which would allow the employer a "shop right" to use such inventions.

Fourth, Florida requires that any assignment agreement be in writing and signed by the employee. Oral agreements or vague policy statements are insufficient. The statute applies to all private employers in Florida with no minimum size threshold. State agencies and public employers have different rules under separate statutes. The remedies available to employees include: declaratory relief that the invention assignment is void, damages for misappropriation if the employer uses the invention in violation of the statute, attorney's fees in some cases, and injunctive relief preventing the employer from claiming ownership or using the invention.

Florida Statute 542.335 contains several important exceptions where employers can claim inventions. First, inventions created using company time, company equipment, company facilities, or company resources may be assigned if the employer provided written notice before or at the time of employment. The statute defines 'company resources' broadly to include research facilities, funding, proprietary information, and employee time on the clock.

Second, inventions that are directly related to the employer's existing business or demonstrably anticipated business line can be assigned even if partially developed on personal time. The critical word is 'directly' — inventions tangentially related do not qualify. For example, a software engineer at a cloud computing company cannot be forced to assign a mobile app they develop in their spare time unless it directly competes with or is integral to the company's services.

Third, the statute does not apply to inventions developed by employees hired specifically for the purpose of inventing or conducting research. Engineers, scientists, and product development specialists hired to innovate are in a different category. However, even these employees retain protection for inventions unrelated to the employer's business, and written notice is still required.

Fourth, the statute contains an exception for trade secrets. If an invention embodies or relies on the employer's trade secrets, the employer may have claims under the Florida Uniform Trade Secrets Act, independent of section 542.335. However, even then, the employee retains rights to the underlying invention itself.

Fifth, the statute does not prohibit non-compete agreements or confidentiality clauses. Employers can restrict an employee's ability to work on competing inventions or disclose information, even if the statute prevents ownership assignment. However, non-competes in Florida are narrowly construed and must be reasonable in scope, time, and geography to be enforceable under Florida Statute 542.335(3).

Step 1 — Document Everything. Keep detailed records of when and where you created the invention. Document whether you used company time (record timestamps of when you worked), company equipment (list tools, software, hardware used), or company facilities (note if work was done at the office, at home, or elsewhere). Save emails, code repositories, design files, or physical prototypes with metadata showing creation dates. Photograph or screenshot any personal equipment or facilities you used. Keep receipts for your own materials and expenses. Maintain a written log of what company knowledge or resources, if any, the invention relied upon. This documentation is critical if the dispute reaches litigation.

Step 2 — Review the Written Agreement and Send Internal Demand. Obtain a copy of your employment agreement, offer letter, employee handbook, and any invention assignment clause you signed. Carefully read what was actually required in writing. Check whether your employer provided written notice of invention assignment rights at the time of hire or before you conceived the invention. Write a letter to your employer's HR department documenting the facts: when you created the invention, what personal resources you used, and how it is unrelated to the company's business. Attach your documentation. Request in writing that the company acknowledge your ownership or provide written explanation of its claim within 10 business days. Preserve this correspondence; it shows you attempted resolution and creates a paper trail.

Step 3 — File a Demand with the Appropriate Agency or Proceed to Court. Florida does not have a specialized administrative agency for invention disputes like the EEOC handles discrimination. You must pursue your claim either through private litigation or through dispute resolution if your employment agreement requires it. File a civil action in the Florida Circuit Court (state court) where you are employed or where the invention was made. The claim should be brought under Florida Statute 542.335 for declaratory relief that the invention assignment is void, and for damages if the employer has already used or disclosed the invention. The complaint must include: (1) your name and the employer's name and address, (2) dates when the invention was conceived and developed, (3) specific facts showing the invention was made on your time with your equipment, (4) explanation of how the invention is unrelated to the employer's business, (5) evidence that written notice was not provided or did not comply with section 542.335, and (6) the relief you seek (typically a declaration of ownership and damages). There is no filing deadline under section 542.335 itself, but Florida's general five-year statute of limitations for contract claims applies. File within five years of the date the employer's violation occurred or when you discovered it.

Step 4 — Understand the Litigation and Discovery Process. After filing, the case enters the discovery phase, where both sides exchange documents and information. You will need to produce all documents related to the invention, your employment, and your employer's business. Your employer will do the same, providing evidence of its business operations, any resources used, and any communications about the invention. Depositions (sworn testimony) will likely occur where both you and company representatives answer questions. Expect the case to take 12–24 months before trial unless settled. During this time, maintain confidentiality of proprietary information while protecting your ownership claims.

Step 5 — Consult an Employment or Intellectual Property Attorney. Before or immediately after receiving notice that your employer claims the invention, contact an attorney licensed in Florida who specializes in employment law or intellectual property law. An employment attorney will evaluate whether section 542.335 protects your invention based on your specific facts. An IP attorney can assess patent and trade secret implications. Many offer free initial consultations. Your attorney can send a demand letter that often resolves disputes without litigation, can file the lawsuit on your behalf, and can negotiate a settlement or licensing agreement. Given the complexity of invention ownership disputes and the potential value of patents, legal representation is strongly recommended before allowing the employer to use or patent your invention.