A design patent protects how a functional article looks — its ornamental appearance — not what it does. It is one of three distinct patent types the U.S. Patent and Trademark Office (USPTO) grants under Title 35 of the U.S. Code, alongside utility patents (function, 35 U.S.C. § 101) and plant patents (35 U.S.C. § 161). For a university technology transfer office (TTO), design patents come up most often for product housings, medical device enclosures, lab equipment form factors, consumer-facing hardware, and packaging — anywhere the visual design of an invention has independent commercial value from its underlying function.
What a design patent covers
Design patents are governed by 35 U.S.C. Chapter 16 (§§ 171–173). Section 171 defines the scope: a design patent may be granted for “any new, original and ornamental design for an article of manufacture.” Three elements matter in that phrase:
- New and original — the design must be novel and not an obvious variant of existing designs, evaluated the same way novelty and non-obviousness are evaluated for utility patents (see our guide to 35 U.S.C. § 102 patent novelty and invention disclosure timing).
- Ornamental — the design must be a matter of appearance, not dictated solely by the function of the article. A shape that exists purely because it is the only shape that could work mechanically is not eligible for design patent protection, even if it looks distinctive.
- Article of manufacture — the design has to be applied to (or embodied in) a physical, manufactured item, or, following USPTO guidance updated for digital and graphical user interfaces, a display screen or icon shown on a device.
Design patents vs. utility patents: the same product can need both
The distinction is appearance versus function, and the two are not mutually exclusive claims on the same invention — they are two different patents protecting two different aspects of it. A single product can be covered by both:
| Dimension | Design patent | Utility patent |
|---|---|---|
| What it protects | Ornamental appearance of an article of manufacture | How an invention works, is made, or is used (function) |
| Statutory basis | 35 U.S.C. § 171 | 35 U.S.C. § 101 |
| Claims | Exactly one claim, drawings are the primary disclosure | One or more claims, written text is the primary disclosure |
| Term | 15 years from grant (35 U.S.C. § 173) | 20 years from earliest non-provisional filing date (35 U.S.C. § 154(a)(2)) |
| Maintenance fees | None | Required at 3.5, 7.5, and 11.5 years after grant (35 U.S.C. § 41(b)) |
| Provisional application route | Not available — design applications are filed directly as nonprovisional | Available under 35 U.S.C. § 111(b), 12-month pendency |
For a piece of lab equipment or a medical device housing, this means a TTO may reasonably pursue a utility patent on the internal mechanism and a separate design patent on the external housing, if the housing shape is not itself dictated purely by function and has standalone visual distinctiveness worth protecting (e.g., against a competitor copying the look of a device without copying its internal engineering). See our Utility Patent dictionary entry for the functional-protection side of that comparison.
How to actually file: the application process
The core procedural rules differ from a utility filing in a few specific ways that matter when you’re actually assembling the application:
- No provisional application. Unlike utility patents, there is no provisional design patent application. Every design filing is a nonprovisional application from the start, examined in order of its filing date. If you’ve worked through our provisional patent application worked example for a utility case, that 12-month placeholder route simply doesn’t exist for a design — there’s no equivalent grace period to delay the real filing.
- Drawings are the disclosure. Per USPTO guidance and MPEP § 1503, the drawing or photograph set is the principal disclosure of the claimed design and must be clear and complete, leaving nothing about the design to conjecture — every view needed to fully show the ornamental design (front, back, top, bottom, sides, perspective) is generally required. Broken or surface-only lines are used to show environmental context or unclaimed portions of the article that aren’t part of the claim.
- Exactly one claim. Under 37 CFR § 1.153, a design patent application may include only a single claim, phrased in the standard form: “The ornamental design for [the article], as shown.” (Or “as shown and described,” where written description of unillustrated aspects is needed.) You cannot claim multiple embodiments in one application the way you might present multiple claims in a utility filing.
- Filing, search, and examination fees are all required at filing, per the current USPTO Patent Fee Schedule — design fees are a separate, generally lower fee category than utility fees, but check the current schedule at filing time rather than relying on a fixed figure, since USPTO fees are revised periodically. Our Cost of Filing a Patent guide covers how these fee categories compare across patent types.
- Filed through USPTO Patent Center, the same online system used for utility applications (EFS-Web and Private PAIR were retired in November 2023). See our companion guide, How to File a Patent Application Online, for the mechanics of creating a Patent Center account, assembling the submission, and tracking prosecution — the platform and account setup are identical for design and utility filings; what differs is the content of the application itself (drawings-as-disclosure, single claim, no provisional stage).
International protection: the Hague System
A U.S. design patent only protects within the United States. For inventions likely to be manufactured or sold internationally — common for licensed university technology destined for a corporate partner with global distribution — the Hague System for the International Registration of Industrial Designs, administered by WIPO, allows a single international application to seek design protection across multiple member countries, including the United States. This is the design-patent analogue to the PCT route for utility patents; see our PCT Patent Application guide for how that international filing route works on the utility side.
Term and cost after grant
Once granted, a design patent filed on or after May 13, 2015 lasts 15 years from the grant date (14 years for designs filed before that date, under the pre-America Invents Act version of § 173). Unlike a utility patent, there are no maintenance fees to keep a design patent in force for its full term — the statute expressly states no fee may be established for maintaining a design (or plant) patent. For the full comparison across all three U.S. patent types, see How Long Do Patents Last?
Why this matters for a university TTO
Design patents are a smaller share of a typical TTO’s portfolio than utility patents, but they are worth considering whenever an invention disclosure includes a device, instrument, or product with a distinctive external form — not just a novel mechanism. Common TTO scenarios where a design filing is worth evaluating alongside (or instead of) a utility filing:
- Medical device housings and enclosures, where the external form has ergonomic or brand-recognition value distinct from the internal mechanism.
- Lab equipment and instrumentation with a distinctive external form factor that a licensee wants to differentiate from competitors.
- Consumer-facing hardware spun out of university research, where visual design is part of what a licensee or investor is paying for.
- Packaging and interface design, including graphical user interfaces and icons under USPTO’s updated guidance for digital designs.
Because a design patent is comparatively fast and inexpensive to pursue relative to a utility filing, and does not compete with a utility filing on the same invention (they protect different things and can be filed together), it is worth raising as a question during invention disclosure review whenever the disclosed technology has a distinctive external appearance — not just when it is the primary subject of the invention.
Frequently asked questions
Can I get both a design patent and a utility patent on the same product?
Yes. They protect different things — appearance versus function — so a single article of manufacture can be covered by a design patent on its ornamental appearance and a utility patent on how it works, filed separately (and potentially at different times, since there’s no requirement to file them together).
Is there a provisional design patent application?
No. Provisional applications under 35 U.S.C. § 111(b) are available only for utility (and plant) patents. Every design patent filing is a nonprovisional application from the outset.
How long does a design patent last?
15 years from the date of grant, for applications filed on or after May 13, 2015 (35 U.S.C. § 173). Applications filed before that date have a 14-year term. There are no maintenance fees to keep a design patent in force.
Do design patents cost less than utility patents?
Design patent filing, search, and examination fees are generally a lower fee category than utility fees on the current USPTO fee schedule, and design applications typically involve less attorney drafting time since the primary disclosure is drawings rather than a written specification with claims — but exact costs vary by case complexity and should be checked against the current USPTO fee schedule rather than assumed.
What has to be in a design patent application?
A single claim in the statutory form, a set of drawings or photographs that fully and clearly disclose every view of the claimed ornamental design, a specification identifying the article of manufacture, and the required filing/search/examination fees — filed through USPTO Patent Center.
This guide covers U.S. design patent law and USPTO procedure as a general reference for research administrators and technology transfer professionals. It is not legal advice; consult registered patent counsel before filing or making disclosure-timing decisions.
