Phone Case Design Patents: How to Search Before You Sell

Why phone cases attract so many design filings

A phone case is cheap to design, cheap to tool, and easy to differentiate visually — ring stands, camera-bump contours, corner geometry, texture patterns and card-slot placement are all common places manufacturers claim as ornamental. Because the underlying phone shape is fixed by the device it fits, filers compete almost entirely on the case's own silhouette and surface details, which produces a dense, fast-moving landscape of active design rights.

Large accessory makers and phone manufacturers themselves — including Apple, Samsung, LG, Bose and Skullcandy — hold active design patents for cases, and a substantial share of newly granted US design patents for "case for mobile telephone" or "case with earphones" originate from manufacturers based in mainland China. That volume is exactly why a text-only search misses conflicts: titles are generic and repetitive, and the distinguishing feature is almost always in the drawings.

Where phone cases sit in the classification systems

WIPO's official Locarno list places "Cases for mobile telephones" (ID 100376) directly under Class 3, subclass 03-01, the same subclass that covers trunks, suitcases, briefcases and handbags — cases "specially designed for their contents." "Covers for telephones" (ID 100350), "Armbands for mobile telephones" (ID 104569) and "Wrist cases for mobile telephones" (ID 104583) are indexed in the same subclass.

At the same time, individual granted US design patents for phone cases show up under both D14 and D3 in practice. A Samsung "case for mobile telephone" filing, for example, carries the classification LOC(15) Cl. 14-03 with US Class D14/253, while other case designs are classified under D3. Because the same product type can land in either class depending on how an examiner read the claim, searching only one US design class will miss valid results — this is exactly the kind of gap that combining a classification search with an image search is meant to close.

A practical search workflow for a case design

1. Search by product terms. Use "phone case," "mobile phone cover," "case for mobile telephone" and device-specific terms (e.g. "MagSafe case," "ring stand case") — filers use inconsistent language, so search several variants.
2. Add the classification. In the US, check both D14 and D3; in the EU and UK, filter by Locarno 03-01 in DesignView or the relevant national eSearch tool.
3. Run an image search. Upload a clear photo or render of the case (front, back, and any distinctive feature like a stand or camera cutout) to catch visually similar designs filed under generic titles.
4. Check status and territory separately. A US design patent does not establish or exclude rights in the EU or UK, and each register shows its own grant and expiry dates.
5. Inspect solid vs. broken lines. Many case drawings use broken lines to exclude the phone itself and only claim the case's exterior — read the drawings guide before comparing scope.

Frequently asked questions

What Locarno class covers phone cases?

Class 3, subclass 03-01 in the international Locarno Classification, which groups cases for mobile telephones with other cases "specially designed for their contents," such as trunks, suitcases and handbags.

Are US design patents for phone cases classified under D14 or D3?

Both classifications appear in granted patents for phone cases. Some are filed and classified under US Class D14 with a Locarno 14-03 reference; others under US Class D3. Search both when clearing a design in the US.

Do I need to search the US, EU and UK separately for a phone case?

Yes. Design rights are territorial, so a granted or pending case design in one market says nothing about the position in another. Screen each market's register before committing to production.

Sources

• WIPO Locarno Classification — Class 3 (List of Goods)
• USPTO MPEP §907 — Locarno Classification Designations
• USPTO — Classification of Design Patents