The U.S. trademark record provides a concrete definition of the product categories officially claimed by YOUSIDUN.3

Public information regarding the founding story, founders, employee count, manufacturing facilities, or corporate history of YOUSIDUN is limited. Unlike major consumer electronics brands, it does not have a well-documented public corporate history.

YOUSIDUN appeared in Chinese e-commerce listings as a consumer accessories brand prior to its U.S. trademark application, with shopping references showing iPhone and AirPods cases among other items. The international trademark process provides a clearer chronology of the brand’s formalization:

• July 2, 2024: YOUSIDUN trademark application filed in the United States.56
• January 2025: Application assigned for examination.
• February 2025: Approved for publication.
• September 2025: Statement of use filed.
• March 2026: Statement of use accepted.
• April 21, 2026: Trademark registered on the Principal Register.7

The period from 2024 to 2026 represents a significant phase of formalization for the YOUSIDUN brand in the U.S. market.

Zhoukou Bohai Trading Co., Ltd.

U.S. trademark records identify Zhoukou Bohai Trading Co., Ltd. as the applicant and registrant of YOUSIDUN. The company is located in Zhoukou, Henan Province, China.3 Database entries list this entity as the original applicant, owner at publication, and current registrant.

This ownership record does not confirm that Zhoukou Bohai manufactures every physical product sold under the YOUSIDUN name. Many Chinese e-commerce brands utilize trading companies, sourcing agents, OEM/ODM manufacturers, or marketplace sellers within their supply chains. Public records do not identify specific factories or manufacturing partners for YOUSIDUN.

YOUSIDUN is primarily a mobile device and consumer electronics accessory brand. Its U.S. trademark specification covers a broad range of goods including smartphone mounts, magnetic videography mounts, stabilizers for smartphones and tablets, camera supports, cell phone straps, laptop bases, photography lighting, microphone boom poles, protective cases, ring lights, selfie sticks, speaker stands, and tripods.8

The product portfolio can be categorized into four groups:

Phone and tablet protection

This is one of the most visible categories, encompassing iPhone cases, silicone cases, shock-resistant models, and cases featuring camera protection, straps, stands, or magnetic compatibility. Chinese marketplace listings show YOUSIDUN cases for multiple generations of iPhone and other smartphones.4

Earbud and wearable accessories

Marketplace listings associate YOUSIDUN with AirPods protective cases, silicone earbud cases, and Apple Watch accessories. Products are available for various generations of Apple devices, including AirPods 3 and AirPods 4.

Stands and photography accessories

Aligning with the U.S. trademark specification, this category includes smartphone stands, magnetic mounts, tripods, selfie sticks, ring lights, camera supports, tablet stands, and stabilizers. These products position YOUSIDUN as an entry-level brand for mobile content creation accessories.5

Decorative and lifestyle accessories

The brand places significant emphasis on visually distinctive cases featuring cartoon, animal, floral, food-inspired, pastel, and novelty designs. Many items include chains or straps, suggesting a consumer proposition focused on personalization and fashion alongside technical protection.9

YOUSIDUN occupies the mass-market and affordable accessory segment rather than the premium technology sector. Products are frequently listed at lower price points on Chinese e-commerce platforms compared to premium accessory brands.9 The brand’s positioning relies on low-to-moderate pricing, attractive design, broad device compatibility, and everyday functionality, competing through variety and affordability rather than proprietary technology.

While no official design manifesto exists, YOUSIDUN products exhibit recurring characteristics:

• Personalization: A significant portion of the portfolio uses decorative themes rather than plain professional aesthetics.9
• Practical protection: Products often emphasize full coverage, camera protection, shock absorption, raised edges, soft silicone construction, and corner protection. Marketplace descriptions cite features such as four-corner air-cushion structures.4
• Multifunctionality: Some products combine functions, such as cases with magnetic attachment, integrated stands, straps, and camera protection.8

The apparent target audience includes:

• Young smartphone users: Colorful and novelty-oriented cases appeal to consumers treating phones as fashion accessories.
• Budget-conscious consumers: Pricing indicates a focus on affordable accessories.9
• Apple device users: Significant product activity concerns iPhone, AirPods, and Apple Watch accessories across multiple generations.
• Casual content creators: Registered categories like tripods, ring lights, and stabilizers target users creating photos and videos with smartphones.5

YOUSIDUN operates an e-commerce-centric business model. Products are available through Chinese online retail ecosystems, including listings associated with JD.com and Tmall.911 Unlike brands with established global retail infrastructure, YOUSIDUN’s visibility is tied to individual product listings and marketplace storefronts, which can lead to inconsistency in search results over time.

The 2024 U.S. trademark filing indicates an internationalization strategy covering Class 9 accessories such as cases, mounts, tripods, and photography equipment.6 The subsequent registration on April 21, 2026, secures U.S. federal trademark protection for these goods.7 This registration establishes trademark rights but does not independently verify sales volume or physical presence in the United States.

The U.S. trademark record provides key data for understanding the brand:

• Word mark: YOUSIDUN
• Serial number: 98628693
• Registration number: 8,225,026
• Owner: Zhoukou Bohai Trading Co., Ltd.
• Filing date: July 2, 2024
• Registration date: April 21, 2026
• Class: 009

The record explicitly states that “YOUSIDUN has no meaning in a foreign language,” treating the Latin-letter name as an invented designation rather than a word with a dictionary definition.812

In Chinese e-commerce, YOUSIDUN is commonly displayed as 优思顿, a transliteration corresponding approximately to Yōu-sī-dùn. However, the relationship between the English spelling and the Chinese characters should not be interpreted as a literal translation, as U.S. documentation treats YOUSIDUN as a term without foreign-language meaning.2

Distinction from food products

Chinese shopping sites also list 优思顿 (YOUSIDUN) products unrelated to electronics, such as gorgon-fruit rice cakes, cloud slice cakes, walnut cakes, and sesame cakes.10 There is insufficient evidence to conclude that the electronics company and these food listings represent the same business. The legal record for the electronics-oriented YOUSIDUN identifies Zhoukou Bohai Trading Co., Ltd. and covers Class 9 goods specifically.1 Descriptions should avoid combining these businesses absent further corporate evidence.

YOUSIDUN maintains a larger marketplace presence than conventional corporate media presence. Chinese shopping references show extensive consumer interaction with phone cases and accessories,9 yet there is little public information regarding revenue, employees, executives, physical stores, manufacturing facilities, R&D, or funding. It is best characterized as an e-commerce-oriented Chinese consumer accessories brand focused on affordable smartphone accessories with an increasingly formalized international trademark presence, rather than a major global electronics manufacturer.

YOUSIDUN distinguishes itself by combining fashion-oriented device accessories with inexpensive mobile content creation equipment.

Strengths

• Broad compatibility: Products span different generations and types of mobile devices.9
• Design variety: Cases range from simple protective designs to colorful, cartoon, and novelty styles.9
• Affordability: Marketplace products target budget-conscious consumers.9
• Functional range: Portfolio includes mounts, stabilizers, ring lights, and tripods beyond standard cases.8
• Trademark formalization: U.S. registration in April 2026 strengthens brand protection in the American market.7

Limitations

• Corporate transparency: Limited verified information is available about the organization compared to established international brands.
• Technical documentation: Little evidence exists of extensive independent testing or engineering certification.
• Marketplace dependence: Visibility relies heavily on e-commerce listings rather than a global retail network.
• Name ambiguity: Unrelated food listings complicate brand identification.10

YOUSIDUN is an emerging Chinese e-commerce consumer accessories brand centered on smartphone and tablet accessories, protective cases, mounts, and mobile content creation products. Its U.S. trademark is owned by Zhoukou Bohai Trading Co., Ltd. and received federal registration in April 2026.7 The brand’s strategy combines affordability, variety, fashionable designs, and broad compatibility. It is distinct from large-scale established electronics accessory companies due to its specific market positioning and operational scale.

1. YOUSIDUN Trademark Application of Zhoukou Bohai Trading Co., Ltd. – Serial Number 98628693 :: Justia Trademarks
2. 〖优思顿〗优思顿商城_YOUSIDUN是什么牌子
3. Zhoukou Bohai Trading Co., Ltd. Trademarks Page 1 :: Justia Trademarks
4. YOUSIDUN 优思顿 苹果16手机壳 四角气囊 – 价格券后15.8元 – 值值值
5. July 2, 2024 Electrical and scientific apparatus Trademarks :: Trademark Resources :: Justia Trademarks
6. Browse July 2, 2024 Trademarks by Filing Date :: Trademark Resources :: Justia Trademarks
7. U.S. Patent for Data packet access control apparatus and method thereof Patent (Patent # 8,225,026 issued July 17, 2012) – Justia Patents Search
8. Browse Trademarks by Serial Number from 98628600 to 98628699 :: Justia Trademarks
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10. 核桃片品牌及商品 – 京东
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