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PatentBrief

IP Ownership

Work for Hire

Patents don't follow copyright's work-for-hire rule — employers need written assignments to own employee inventions. State laws further limit what employers can claim from employees' own-time projects.

What is work for hire and how does it differ between patents and copyrights?

Work for hire is a legal doctrine that determines ownership of IP created during employment or contracted work, but it operates very differently for patents vs. copyrights.

For Copyrights

  • The Copyright Act (17 U.S.C. § 101) defines work made for hire as: (a) a work prepared by an employee within the scope of employment
  • OR (b) a work specially ordered or commissioned for use in one of nine specific categories (as part of a collective work; as a contribution to a motion picture or other audiovisual work; as a translation; as a supplementary work; as a compilation; as an instructional text; as a test; as answer material for a test; as an atlas) IF the parties agree in a written instrument signed by them
  • Copyright in a work made for hire belongs to the employer or commissioning party as the 'author'

For Patents

  • There is NO automatic work-for-hire doctrine in US patent law
  • The patent initially vests in the human inventor(s)
  • An employer does NOT automatically own an employee's patent
  • Stanford v. Roche (S.Ct. 2011) confirmed: 'Since 1790, the patent law has operated on the premise that rights in an invention belong to the inventor. The inventor is the presumptive owner'

How Employers Obtain Patent Rights

  • (a) written assignment agreement: employee assigns future inventions to employer (pre-invention assignment agreement, PIAA or PRAIA)
  • (b) implied assignment (shop right): employer gets a non-exclusive, royalty-free license to use the invention if employee used employer's resources, time, or facilities

This Means. An employer who fails to have employees sign a proper assignment agreement may NOT own the patents on their employees' inventions — a common and costly mistake.

What do pre-invention assignment agreements cover and what are their limits?

Pre-invention assignment agreements (PIAAs) are the primary mechanism by which employers obtain rights to employee inventions.

Typical Piaa Provisions

  • (a) ASSIGNMENT OF FUTURE INVENTIONS: employee agrees to assign all inventions made during employment that: relate to the employer's current or anticipated business
  • Result from work performed for the employer
  • Are made using employer's resources (time, equipment, facilities, information)
  • (b) DISCLOSURE OBLIGATION: employee must promptly disclose all inventions to the employer
  • Even if employee believes the invention is personal and outside the agreement
  • (c) ASSISTANCE OBLIGATION: employee must assist employer in obtaining patents
  • Sign patent applications
  • Execute assignments
  • Cooperate with prosecution
  • (d) CONFIDENTIALITY: related NDA provisions protecting employer's trade secrets

State Law Limitations — Statutory Carve-outs

  • Several states limit what an employer can claim through PIAAs
  • CALIFORNIA (Labor Code § 2870): employer cannot claim inventions for which: NO employer equipment, supplies, facilities, or trade secret information was used
  • AND developed entirely on employee's own time
  • AND do not relate to employer's business or anticipated R&D
  • AND do not result from any work performed by employee for employer
  • ALL FOUR CONDITIONS must be met for the invention to be the employee's
  • Minnesota, Washington (RCW 49.44.140), North Carolina, Delaware have similar statutes

Best Practices for Employers

  • PIAA should acknowledge state law limitations
  • Narrow scope to what is legally permissible
  • Use clear definitions of 'related to business'
  • Review and update as company's business evolves

Best Practices for Employees

  • Carefully review PIAA before signing
  • Disclose pre-existing inventions to carve out existing IP
  • Document side projects to show they meet carve-out criteria.

Who owns inventions made by independent contractors?

Independent contractor IP ownership is different from employee ownership and often misunderstood.

Default Rule for Patent Inventions

  • For patents, the human inventor always starts with ownership
  • If an independent contractor invents something, the contractor owns the patent unless there is a written assignment
  • The hiring party does NOT get automatic ownership merely by paying for the contractor's work

Default Rule for Copyrights

  • Work made for hire for contractors requires: (a) written agreement designating the work as 'work made for hire'
  • AND (b) the work must fall into one of the nine specific copyright categories in § 101
  • If these conditions are not met, the contractor owns the copyright
  • Often, the work doesn't fall into a § 101 category (e.g., a software program written by a contractor is NOT on the list of nine categories)
  • Result: copyright in the software belongs to the contractor unless there is a separate written assignment

Common Mistakes

  • Assuming contractor work is automatically owned by the hiring company
  • Using oral agreements or email confirmations instead of written assignments
  • Failing to obtain assignments before the contractor becomes unavailable or disputes arise

Contractor Patent Assignment

  • The hiring party should obtain a written patent assignment BEFORE work begins
  • Include in the services agreement: present tense assignment ('Contractor hereby assigns') rather than an agreement to assign in the future (which might require further action)

Immigration Status Note

  • Some contractors are on visa status that limits their ability to file as sole inventors
  • Employer sponsorship may be needed

Joint Inventorship Risk. If an employee of the hiring company makes suggestions that rise to the level of conceiving the claimed invention, there may be joint inventorship between the contractor and the employee — which means the employee's employer has a joint ownership interest.

What is a shop right and when does it apply?

A shop right is a limited, non-exclusive, non-transferable, royalty-free license implied by law when an employee uses an employer's resources to develop an invention.

Shop Right Requirements

  • The employee must have: (a) used the employer's time, facilities, equipment, or materials
  • OR (b) developed the invention while performing the employer's work
  • The employee is the inventor and owns the patent
  • But the employer gets a royalty-free license to practice the invention

Scope of Shop Right

Non-exclusive

  • The employer cannot exclude others
  • The employee/inventor retains the right to license others

Non-transferable. The employer cannot transfer the shop right to a third party (cannot sell it or include it in a corporate sale)

Royalty-free. No payment required by the employer

Irrevocable

  • The shop right is permanent — it cannot be revoked by the employee/inventor
  • No injunction against employer

What Shop Right Does not Give

  • Ownership of the patent
  • The right to exclude others
  • The right to license the technology to third parties
  • The right to take the license in a company transaction (shop rights typically do NOT transfer with a company sale — they belong to the original employer entity, not successors)

Practical Impact

  • Shop right arises when employer does NOT have a PIAA
  • Shop right prevents the employer from being sued for infringement but does not give full ownership
  • A startup that failed to get employee assignments may only have shop rights — making the patents useless as assets (cannot be pledged as collateral; do not transfer in an acquisition) unless the inventors later assign

Estoppel and Equitable Shop Right

  • Courts may also imply shop rights from the employee's conduct in assisting the employer in using the invention
  • Cases of employer reasonable reliance.

How do employment agreement IP provisions interact with state law protections?

The intersection of employment agreements and state law creates important employee rights.

California Labor Code § 2870 — Most Protective

  • Four-part test for employee-owned inventions (must meet ALL): entirely on employee's own time
  • No employer equipment, supplies, facilities, or trade secret information used
  • Does not relate to employer's current or reasonably anticipated business activities
  • Does not result from any work performed by employee for employer

Practical Application

  • A software engineer at a tech company who codes a mobile app at home on personal equipment: does the app relate to the employer's business? (broad question)
  • Does it use any confidential employer information? (even mental knowledge of internal systems could trigger this)
  • A strict reading makes California carve-outs narrow for tech employees whose employer is broadly in 'technology'

Disclosure Requirement

  • California employers must provide employees with a copy of Labor Code § 2870
  • Some employers include a notice in the PIAA

Void Provisions. Provisions in PIAAs that purport to claim rights beyond what state law allows are void (but only the overbroad provision, not the entire agreement)

Washington Rcw 49.44.140

  • Similar to California
  • Additional requirement: employer must provide written notice of the law to employees

Minnesota. Similar four-part test

Delaware. Similar statutory limits

Non-compete Interaction

  • In states that ban non-competes (California), employees leave freely but PIAAs remain enforceable
  • An employee who leaves and continues working on a project started at the prior employer must carefully evaluate ownership

Startup Founders

  • Founders often sign PIAAs at prior employers
  • Inventions conceived while still employed may be owned by the prior employer regardless of when filed
  • A gap between prior employment and the startup's incorporation may be important
  • Best practice: have founders disclose all prior work and obtain clearance letters from prior employers.

Related guides

Employee InventionShop RightPatent AssignmentJoint OwnershipTrade Secret