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Employee Invention Assignment in Australian Employment Contracts: Patents Act 1990 and Common Law

Last updated: 15 May 2026 · BeforeYouSign Editorial Team

Most Australian employers include an intellectual property assignment clause in employment contracts, transferring ownership of inventions, software, designs, and other creative works the employee produces during employment. The clauses can be narrow (limited to work directly related to the role) or extraordinarily broad (capturing everything the employee creates during the employment period, even on personal time and unrelated to the role). Australia, unlike the United Kingdom or several US states, has no specific statutory cap on the scope of employee IP assignment clauses. The Patents Act 1990 (Cth) governs patent ownership but defaults to common law principles where the contract is silent. The result is that broadly drafted assignment clauses are generally enforceable, with limits coming from the implied terms of the employment contract, the duty of fidelity, and case law on unconscionable conduct.

What is a Employee Invention Assignment?

An employee invention assignment clause in an Australian employment contract transfers ownership of intellectual property created by the employee to the employer. Under Australian common law (University of Western Australia v Gray [2009] FCAFC 116), an employee is generally not required to invent — the duty arises only where invention is part of the role. The Patents Act 1990 (Cth) does not contain an automatic employer-ownership rule like UK Patents Act 1977 s 39. Instead, ownership follows the contract, with default common law gap-filling. Copyright in works created by employees in the course of employment vests in the employer by default under Copyright Act 1968 (Cth) s 35(6). Design rights and other IP follow similar contract-based rules. Confidentiality and the duty of fidelity may protect employer interests independent of assignment.

Red flags to watch for

Assignment of all IP created during the employment period, including personal projects

A clause assigning IP created 'at any time during employment' regardless of relation to the role captures personal projects, side businesses, and inventions made outside work hours. Under University of Western Australia v Gray, the employer's claim to such IP requires a strong contractual basis, but a broadly drafted clause is generally enforceable — making it critical to negotiate carve-outs.

Assignment with no employee retained list or schedule of pre-existing IP

Without a schedule of pre-existing IP (works the employee owned before employment), the contract risks ambiguity about which IP is the employer's. A pre-existing IP schedule protects both parties.

Assignment of moral rights without specific consent or compensation

Under Copyright Act 1968 (Cth) Part IX (introduced 2000), authors have moral rights — including the right of attribution and integrity — that are personal and cannot be assigned. They can be 'consented to' under specific written consent, but a blanket clause purporting to assign or waive moral rights is ineffective.

Assignment extending to inventions made after termination

Post-termination IP assignment clauses are particularly restrictive. They function like non-competes in effect and may be unenforceable to the extent they restrict the employee's lawful post-employment activity. Limits should align with the period during which the employee accessed confidential information.

No provision for inventor recognition or compensation for patentable inventions

Australia has no statutory scheme like UK Patents Act 1977 ss 40-41 (compensation for outstanding patent benefit) or German employee invention compensation. But many sophisticated employers include voluntary recognition or compensation schemes. Their absence is not unlawful but is a negotiating point.

Assignment extending to client/customer-owned IP

In consulting or contractor-style roles, the employer often has IP obligations to customers. A clause that purports to assign customer IP to the employer creates conflict and may be unenforceable. The assignment should expressly preserve customer-owned IP.

Assignment without 'further assurance' provision triggering ongoing employee obligations post-termination

Many assignment clauses include a 'further assurance' obligation requiring the former employee to execute documents to perfect IP transfers after termination. Without time limits or compensation, this can be burdensome. Reasonable practice: limited time, reasonable compensation for time spent.

Your legal rights

Australian employee IP assignment is governed by: the contract terms, supplemented by common law (University of Western Australia v Gray [2009] FCAFC 116, Spencer Industries Pty Ltd v Collins [2003] FCA 542); the Patents Act 1990 (Cth) for patentable inventions; the Copyright Act 1968 (Cth), with s 35(6) creating a default rule that copyright in employee works vests in the employer; the Designs Act 2003 (Cth); the Plant Breeder's Rights Act 1994 (Cth); the Circuit Layouts Act 1989 (Cth); the Copyright Act 1968 Part IX (moral rights, personal and non-assignable); common law confidentiality and the duty of fidelity. Fair Work Act 2009 (Cth) general protections apply where assignment clauses operate as adverse action. ACL ss 21 (unconscionable conduct) and 18 (misleading conduct) may apply in egregious cases.

Questions to ask before you sign

  • 1What scope of IP is assigned — all IP created during employment, or only IP related to the role?
  • 2Is there a schedule of pre-existing IP that you retain?
  • 3How are moral rights addressed — assignment, consent, or silence?
  • 4Does the assignment extend to inventions made after termination, and if so, what justifies it?
  • 5Is there any provision for recognition or compensation for patentable inventions?
  • 6Are customer-owned and third-party IP rights expressly preserved?
  • 7What further assurance obligations apply post-termination, and are they time-limited and reasonably compensated?

Disclaimer: This guide is for educational purposes only and does not constitute legal advice. Contract law varies by jurisdiction and individual circumstances. Always consult a qualified legal professional before making decisions based on this information.

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