A design patent protects the shape, form, or pattern of a product visible from the outside - not its function. If your product sells because of how it looks, not because of a new mechanism inside it, this is the protection that fits.

What a design patent protects

Under Thailand's Patent Act B.E. 2522, a design patent protects the shape, form, or pattern of a product visible from the outside, including the arrangement of color elements on the product's surface. It suits products where external appearance is a key selling point, such as packaging, furniture, electronics, or cosmetics containers.

Shapes dictated purely by functional necessity don't qualify - in that case, consider an invention patent or petty patent instead.

How long protection lasts

A design patent is protected for 10 years from the filing date and cannot be renewed - unlike a trademark, which can be renewed indefinitely. The key requirement is that the design must be new (see Novelty in the glossary) as of the filing date. Public disclosure before filing - launching the product, posting product photos, or sending samples to customers - can forfeit that right, so always file before launch.

Design patent vs. invention patent vs. petty patent

A design patent protects "how it looks." An invention patent and petty patent protect "how it works" - the mechanism or process. The same product can hold both kinds of protection at once, covering different aspects. For a deeper look at invention patents vs. petty patents specifically, read Petty Patent vs. Invention Patent: What's the Difference, and Which Should You Choose?

Design patent vs. trademark shape protection

A design patent and a trademark protect different things, even when both involve a product's shape:

  • A design patent checks whether the appearance is new as of the filing date. Protection is fixed at 10 years and cannot be renewed.
  • A trademark checks whether the mark is distinctive enough for consumers to identify the source of the goods. Protection lasts 10 years and can be renewed indefinitely as long as the mark stays in use.

In short: a design patent answers "is this appearance new?" A trademark answers "do consumers recognize this as your brand?" Some products genuinely benefit from both at once - consult an agent to assess your specific case.

Basic filing requirements and process

Broadly, filing a design patent application means submitting to the Department of Intellectual Property, a formality examination (checking the application and documents are complete), and a substantive examination (checking the design is genuinely new and not contrary to public order or morality) before the patent is granted.

Documents needed

You'll generally need images or drawings showing the product's appearance from enough angles to fully convey its shape, identity documents for the applicant, and a power of attorney if filed through an agent. The exact document list varies by product - consult a patent agent before preparing your documents to get it right the first time.

FAQ

If I already have a design patent, can I still register a trademark for the same shape?

In principle, yes - they're different forms of IP protecting different things (novelty of the appearance as of the filing date, versus indicating the source of goods). But consult an agent for your specific case, since distinctiveness and disclosure timing both need to be weighed together.

If I've already shown my product's design to the public before filing, can I still get a design patent?

There's a high risk of losing novelty under the Patent Act B.E. 2522, which is a mandatory requirement for design patents. Always file before launching a product or publishing images of it.