Who Owns Custom Designs, Drawings, and Tooling Created During Manufacturing?

Short Answer

Ownership of custom designs, drawings, computer-aided design (CAD), tooling, molds, jigs, fixtures, manufacturing know-how, test data, and improvements is not automatically decided simply by who paid for the manufacturing project.

In manufacturing relationships involving Korean companies, ownership and use rights depend on the contract, the type of asset involved, the parties’ contributions, applicable intellectual property law, trade secret protection, and ownership rules for physical property.

This is why foreign companies should not assume that paying development costs or supplying the initial product concept automatically gives them full control over every design, file, mold, process, or improvement created during manufacturing.

---

Why Does This Become a Dispute?

Manufacturing projects often create valuable assets beyond the finished products.

During development and production, the parties may create, modify, or exchange design drawings, CAD files, prototypes, molds, tooling, jigs, fixtures, software, firmware, test results, quality-control data, process conditions, manufacturing know-how, and product improvements.

If the relationship later ends, the parties may dispute:

• Who owns the drawings or CAD files
• Who owns the molds or tooling
• Who may use the manufacturing know-how
• Who owns improvements or modified designs
• Whether subcontractors may continue using technical materials
• Whether the materials must be returned, destroyed, or transferred to a replacement manufacturer

The dispute is often not only about ownership. It is also about who may continue using the assets after the manufacturing relationship ends.

---

Key Ownership Issues in Manufacturing Contracts

Issue 1: Custom Designs, Drawings, and CAD Files

Drawings and CAD files may raise intellectual property issues, but their legal treatment is not always simple.

Some drawings may be protected if they contain sufficient creative expression. However, where a drawing is dictated mainly by technical function, product specifications, industry standards, or mechanical requirements, protection may be more limited.

In practice, foreign companies should not rely only on general intellectual property law. The contract should clearly state:

• Who owns the original drawings
• Who owns revised versions
• Who may modify the files
• Who may keep copies
• Whether files may be provided to subcontractors
• Whether the manufacturer may reuse similar designs for other customers

This distinction is important because possession of a file does not necessarily mean ownership of all rights in that file.

---

Issue 2: Tooling, Molds, Jigs, and Fixtures

Tooling and molds are physical assets.

A foreign customer may pay for molds or tooling, but payment alone may not fully resolve questions such as ownership, possession, storage, inspection, maintenance, permitted use, return, or transfer.

The contract should specify:

• Who owns the tooling
• Where it will be stored
• Whether the manufacturer may use it for other customers
• Who maintains and insures it
• Whether the customer may inspect it
• When and how it must be returned
• Who pays removal, packing, and transportation costs

This is especially important where the tooling remains physically located at the Korean manufacturer’s factory.

---

Issue 3: Manufacturing Know-How and Process Data

Manufacturing value often lies not only in formal IP rights, but also in process know-how, production settings, testing methods, QC data, supplier information, and accumulated technical experience.

Such information may be protectable as confidential information or trade secrets if properly managed, but the contract should define the parties’ rights clearly.

Important questions include:

• Who may use process know-how after termination
• Whether test data and QC data must be shared
• Whether the manufacturer may apply accumulated know-how to other projects
• Whether the customer may transfer the process to another manufacturer
• How confidential information must be marked, stored, and protected

Without clear rules, both sides may claim legitimate use of the same technical information.

---

Issue 4: Improvements and Joint Development

Manufacturing relationships often produce improvements, engineering modifications, design changes, cost-reduction ideas, process optimizations, and derivative works.

These improvements may be developed by the customer, the manufacturer, both parties, or subcontractors.

The contract should address:

• Who owns improvements
• Who may file patent applications
• Whether the other party receives a license
• Whether improvements are limited to a field, territory, or product line
• Who may use improvements after termination
• How jointly developed results are handled

If the contract is silent, later disputes may focus on each party’s technical contribution and whether the improvement is a customer asset, manufacturer asset, or jointly developed result.

---

Issue 5: Subcontractors and Supply Chain Use

In manufacturing, technical materials are often shared with subcontractors, affiliates, tool shops, testing labs, or component suppliers.

The contract should clearly regulate:

• Whether subcontracting is permitted
• Whether prior written approval is required
• What information may be shared
• Whether subcontractors must sign confidentiality obligations
• Who is responsible for subcontractor misuse
• Whether subcontractors must return or destroy materials

Without these protections, drawings, tooling information, or process know-how may spread beyond the original manufacturing relationship.

---

What Should Happen When Manufacturing Ends?

Many ownership disputes arise only after production stops.

The contract should explain what happens to:

• Molds and tooling
• Drawings and CAD files
• Source code or firmware files
• Testing records
• Quality-control data
• Manufacturing documents
• Confidential information
• Partially completed goods
• Digital backups
• Subcontractor-held materials

Depending on the transaction, the agreement may require return, destruction, transfer to a replacement manufacturer, limited retention for regulatory or warranty purposes, or continued use under a license.

These obligations should be specific, practical, and capable of being performed.

---

Practical Drafting Tips for Foreign Companies

Foreign companies manufacturing products in Korea should consider including provisions that clearly address:

• Definitions of tooling, drawings, CAD files, technical data, know-how, and improvements
• Ownership of physical tooling and molds
• Ownership and use rights for drawings and technical files
• Confidentiality and trade secret management
• Subcontractor restrictions and flow-down obligations
• Rights to improvements and jointly developed results
• Return, destruction, and transfer obligations
• Inspection and audit rights
• Transition assistance to a new manufacturer
• Continued-use licenses, if needed
• Remedies for unauthorized use

These issues should be addressed before production begins, not after the relationship has already deteriorated.

---

Conclusion

Custom designs, drawings, CAD files, tooling, molds, process know-how, and improvements are often among the most valuable assets created during a manufacturing relationship.

For foreign companies working with Korean manufacturers, the safest approach is to define who owns each asset, who may use it, who may modify it, who may share it, and what happens to it when the relationship ends.

Clear drafting can reduce the risk of a costly dispute over the technical materials and production assets needed to continue manufacturing the product.

---