The act of patenting a structural design in the United States (U.S.) in 2026 is neither a purely technical exercise nor a purely aesthetic one, but rather an intricate legal undertaking situated at the boundary between engineering necessity and visual expression, where the structural configuration of an article must be translated into a legally cognizable claim of ornamental design under 35 U.S.C. § 171, administered by the United States Patent and Trademark Office (USPTO), and interpreted through a body of jurisprudence that has progressively refined the distinction between function and ornament without ever entirely dissolving the tension between them.

The term “structural design” is frequently misunderstood in patent discourse, because it evokes the language of load-bearing elements, mechanical frames, housings, chassis, façade panels, modular connectors, and engineered assemblies, each of which is inherently functional, yet design patent law protects only the ornamental appearance of an article of manufacture, thereby compelling applicants and courts alike to engage in a subtle inquiry: when does structural form transcend necessity and become protectable visual identity?

It is pertinent to explore and understand the aforesaid question in depth, synthesizing statutory doctrine, Federal Circuit jurisprudence, Supreme Court guidance, USPTO practice as of 2026, and real-world U.S. product case studies in consumer electronics, automotive design, footwear, and architectural systems, in order to provide a comprehensive roadmap for scholars and practitioners seeking to understand, prosecute, enforce, or critique structural design patents within the contemporary American intellectual property system.

The Statutory Foundation: 35 U.S.C. § 171 and the Ornamentality Requirement

The starting point for any discussion of structural design patentability is 35 U.S.C. § 171, which provides protection for “any new, original and ornamental design for an article of manufacture,” thereby establishing the four doctrinal pillars of design patentability: novelty, originality, ornamentality, and embodiment in an article of manufacture.

Unlike utility patents under § 101, which protect functional inventions and technological improvements, design patents protect the visual appearance of an article as perceived by the eye, and the statutory emphasis on ornamentality ensures that design patents do not become a surrogate for monopolizing utilitarian configurations that the U.S. Congress intended to remain within the domain of utility patent protection.

The tension becomes especially pronounced in structural contexts, because structural elements by definition serve engineering purposes, whether they are reinforcing ribs in a molded housing, lattice structures in a façade panel, or the skeletal framework of a mechanical assembly; thus, the central doctrinal inquiry is not whether the structure serves a function, almost all manufactured articles do, but whether the particular configuration claimed is dictated solely by functional necessity or whether alternative ornamental embodiments could achieve the same functional objective.

This distinction was articulated with clarity in Best Lock Corp. v. Ilco Unican Corp., where the Federal Circuit invalidated a design patent covering a key blade whose geometry was constrained by the need to mate with a corresponding lock, concluding that because no alternative shapes could perform the same function, the design lacked ornamentality and was therefore not eligible for protection under § 171.

The enduring lesson of Best Lock is not that structural designs are categorically ineligible for protection, but that structural designs must be shown, either implicitly through their visible diversity or explicitly through argument, to possess ornamental latitude beyond pure mechanical inevitability.

The Role of the Ordinary Observer: Scope and Infringement

In 2008, the Federal Circuit sitting en banc in Egyptian Goddess, Inc. v. Swisa, Inc. clarified that design patent infringement is governed by the “ordinary observer” test, eliminating the separate “point of novelty” analysis and emphasizing that infringement occurs when an ordinary observer, familiar with the prior art, would view the accused design as substantially the same as the patented design.

For structural designs, this test is particularly significant, because structural products often contain numerous technical features that may be functional in isolation but collectively contribute to a distinctive overall visual impression; thus, courts are instructed to evaluate the design as a whole rather than dissecting it into functional and ornamental fragments.

The ordinary observer test recognizes that structural design protection resides in the totality of visual appearance, silhouette, proportion, curvature, surface treatment, symmetry, and the interplay of solid and void, and not in the technical purpose served by each individual element.

Structural Design in Real-World U.S. Markets

(1) Consumer electronics – the structural shell as brand identity: Few case studies illustrate the economic power of structural design patents more vividly than the litigation between Apple Inc. and Samsung Electronics concerning the exterior configuration of the iPhone.

The iPhone’s rectangular front face with rounded corners, minimal bezel framing, and clean planar surfaces represent structural features necessary to house internal electronics and a touchscreen display, yet those features were also found to embody a distinctive ornamental identity that merited design patent protection.

In Apple Inc. v. Samsung Electronics Co., the U.S. Supreme Court addressed damages under 35 U.S.C. § 289 and held that the “article of manufacture” for purposes of total profit disgorgement could be a component of a multi-component product, rather than necessarily the entire end product sold to consumers, thereby reshaping the damages framework for structural design patents embedded within complex technological devices.

The case stands as a landmark demonstration that structural housing geometry, though utilitarian, can define the commercial identity of a product and justify substantial monetary remedies.

(2) Athletic footwear – sculptural structure and market differentiation: The sculpted midsole and structural sidewall configurations of sneakers produced by Nike, Inc. offer another instructive example of structural design protection.

The midsole must absorb impact and provide stability, yet its visible geometry, ridges, wave patterns, layered contours, often serves no purpose beyond aesthetic differentiation and brand signaling, thereby making it fertile ground for design patent protection.

In enforcement actions against competitors producing visually similar shoe silhouettes, Nike and other footwear companies have relied upon design patents covering structural configurations of midsoles and uppers, demonstrating that structural necessity does not negate ornamentality when alternative forms are available.

(3) Automotive design – structural panels and grille geometry: In the automotive industry, the exterior panels, grille assemblies, and headlamp structures of vehicles produced by Ford Motor Company and Tesla, Inc. exemplify structural design protection at scale.

A vehicle grille must facilitate airflow and integrate with crash structures, yet its outline, mesh pattern, and border thickness may constitute a distinctive ornamental signature that consumers associate with a particular brand.

Design patents covering such structural components are frequently enforced against aftermarket parts manufacturers, reinforcing the commercial importance of protecting visible structural elements even when they serve functional purposes.

(4) Architectural and modular structural systems: Structural design patents are not confined to consumer goods; they increasingly appear in architectural and modular construction systems, where façade panels, connector nodes, and prefabricated structural modules possess distinctive visual geometries.

Although such elements serve load-bearing or assembly functions, their visible configuration, arrangement of perforations, curvature of edges, proportional spacing, may embody ornamental features eligible for protection under § 171, provided alternative configurations could achieve similar performance.

Drafting Structural Design Patents: The Primacy of Drawings

In design patent practice, the drawings are the claim, and the claim is the drawings; thus, drafting strategy assumes paramount importance, especially for structural designs containing both functional and ornamental elements.

Applicants must provide sufficient views, typically front, rear, left, right, top, bottom, and perspective, to fully disclose the design, and must use surface shading to indicate contour, depth, and curvature, as required by USPTO examination practice.

Broken lines are a particularly powerful tool in structural contexts, allowing applicants to disclaim unclaimed portions of a larger assembly and focus protection on specific ornamental aspects of the structural configuration.

Failure to include necessary shading or views at filing may result in rejections for indefiniteness or new matter under § 132 if later corrections are attempted, underscoring the importance of precision at the outset.

Examination Practice at the USPTO in 2026

As of 2026, the USPTO continues to examine design applications for compliance with §§ 102, 103, 112, and 171, and structural design applicants must anticipate rejections based on prior art references that create similar overall visual impressions.

Because design patent obviousness under § 103 requires a primary reference with design characteristics “basically the same” as the claimed design, examiners often combine references to demonstrate that the overall impression would have been obvious to a designer of ordinary skill in the relevant field.

In structural contexts, applicants frequently distinguish prior art by emphasizing differences in proportion, contour, spacing, and visual balance, rather than minor geometric variations.

Remedies and Damages: The Continuing Relevance of § 289

Section 289 provides that a design patent infringer “shall be liable to the owner to the extent of his total profit” on the article of manufacture to which the design is applied, a remedy that distinguishes design patents from utility patents and elevates their strategic value.

The Supreme Court’s interpretation of § 289 in Apple Inc. v. Samsung Electronics Co. clarified that the relevant article may be a component rather than the entire product, introducing analytical complexity but preserving the availability of profit disgorgement.

For structural designs embedded in multi-component systems, such as device housings, vehicle panels, or modular assemblies, the identification of the relevant article of manufacture may significantly influence damages outcomes.

International Strategy: The Hague System

Although U.S. design patents provide territorial protection, structural design innovators frequently seek international protection through the World Intellectual Property Organization (WIPO) under the Hague Agreement Concerning the International Registration of Industrial Designs, which permits a single application designating multiple jurisdictions.

While each designated country applies its own substantive standards, coordinated filing strategies are essential for structural designs marketed globally.

Structural Design as Economic Architecture

The structural design patent reflects the broader economic reality that visual form is no longer ancillary to function but central to competitive identity, especially in markets where consumers perceive innovation through aesthetic cues as much as through technical specifications.

Structural geometry, the curve of a smartphone corner, the ribbed contour of a sneaker midsole, the mesh pattern of a grille, communicates brand identity, and design patents function as legal mechanisms to preserve that communicative structure against imitation.

Conclusion

Therefore, to patent a structural design in the U.S. in 2026 is to engage with a sophisticated doctrinal framework that demands ornamentality without denying function, that protects overall visual impression under Egyptian Goddess, Inc. v. Swisa, Inc., that polices functional exclusivity under Best Lock Corp. v. Ilco Unican Corp., and that calculates remedies under the guidance of Apple Inc. v. Samsung Electronics Co.

It requires mastery of drafting strategy, awareness of prior art landscapes, and appreciation of the economic power of structural form in modern markets. For the advanced practitioner and scholar alike, structural design patenting represents a dynamic and evolving domain in which engineering, aesthetics, statutory interpretation, and market competition converge, reminding us that the architecture of physical products is also the architecture of intellectual property rights.