---
name: field-of-use-restriction
title: Field of Use Restriction Clause
description: Drafts field-of-use restriction clauses for IP licensing agreements. Covers grant language, prohibited activities, audit rights, breach remedies, and dispute resolution. Use when drafting IP license restrictions, patent field-of-use limitations, technology licensing clauses, or licensee scope provisions.
author: CaseMark
author_url: https://github.com/CaseMark/skills/tree/main/skills/legal/field-of-use-restriction
license: Apache-2.0
version: 0.1.0
execution_mode: open
jurisdiction: general
practice: ip
language: en
tags: [agreement, drafting, transactional]
---

# Field of Use Restriction Clause

Draft an enforceable field-of-use restriction clause that limits licensee exploitation to a defined scope while preserving licensor rights.

## Prerequisites

Gather before drafting:

1. **Licensed IP** — patent numbers, technology descriptions, product specs, trade secret scope
2. **Existing agreements** — prior licenses, third-party rights, commitments affecting grantable scope
3. **Business parameters** — field boundaries (industry, geography, customer type, application method), exclusivity, sublicensing intent
4. **Party information** — licensor/licensee details, affiliates, related entities

## Workflow

### 1. Define Key Terms

| Term | Drafting Notes |
|------|---------------|
| Licensed Technology | Draw from patent claims, technical specs, product docs |
| Field of Use | Delineate by industry sector, geographic market, customer type, application method, or combination |
| Permitted Applications | Affirmative list of authorized uses |
| Restricted Fields | Explicit exclusions from the grant |
| Improvements / Derivatives | Whether modifications remain subject to restriction |

Cross-reference definitions with industry-standard terminology. Pull technical language from uploaded patent claims and specs.

### 2. Draft Grant of License

Grant clause must address:

- Exclusivity status within the permitted field
- Sublicensing rights and conditions
- Specific patent numbers; whether continuations/improvements included
- Know-how/trade secret scope and disclosure restrictions
- Term, renewal conditions, milestone-based field expansion
- Prior licenses or third-party rights carve-outs

Reserve all rights not expressly granted.

### 3. Specify Restrictions & Prohibited Activities

| Prohibition | Language Target |
|-------------|----------------|
| Direct use outside field | "shall not, directly or indirectly, use Licensed Technology for any purpose outside the Field of Use" |
| Sublicense/assignment to restricted fields | Prohibit transfer of rights into restricted areas |
| Circumvention via affiliates/third parties | Bar supplying components to parties who will use in restricted fields |
| Derivative works in restricted fields | Modifications remain subject to field restriction |

Affirmative obligations: flow-down to sublicenses, product marking with notices, internal compliance controls.

### 4. Include Monitoring & Audit Rights

- **Audit right** — licensor may audit books, records, operations for field compliance
- **Notice period** — typically 15–30 days
- **Records retention** — sales by application/market, customer lists, product descriptions
- **Periodic reporting** — tie compliance reporting to royalty calculations where applicable
- **Cooperation** — licensee must provide access and information

### 5. Define Breach Remedies

| Breach Severity | Consequence |
|-----------------|-------------|
| Material / willful | Immediate termination, no cure period |
| Minor / inadvertent | Cure period (typically 30 days), auto-termination if unremedied |

**Monetary**: liquidated damages (reasonable, not punitive), enhanced royalties on unauthorized uses, disgorgement of restricted-field profits.

**Equitable**: injunctive relief preserved; post-termination cease-use, return/destroy materials, assign IP from unauthorized use. Confidentiality and field restrictions survive termination.

### 6. Set Governing Law & Dispute Resolution

- **Choice of law** — jurisdiction with developed licensing case law (licensor HQ, technology origin, or primary licensee operations)
- **Dispute mechanism** — litigation, arbitration (technical panel for complex IP), or hybrid
- **Expedited relief** — preserve court access for TROs/preliminary injunctions even under arbitration
- **Fees** — each party bears own unless position substantially unjustified

## Pitfalls & Checks

- Define field boundaries using **multiple parameters** (industry + application + geography) to reduce ambiguity
- Ensure liquidated damages are calibrated to anticipated harm, not punitive
- Verify all factual details (patent numbers, specs) match uploaded source documents exactly
- Flag jurisdiction-specific enforceability concerns — U.S. antitrust/competition law may limit overly broad restrictions (*Princo Corp. v. ITC*, 616 F.3d 1318 (Fed. Cir. 2010) [VERIFY])
- Adapt all language to specific deal terms; do not copy template language verbatim
- Mark clause for attorney review — field-of-use disputes are heavily fact-dependent

---