Hello, I’m Linda (Saihua Liu), Overseas Sales Manager at Angeluo Electrical (Yeyun Technology Co., Ltd.). For years, we have received consistent inquiries from our global customers regarding the patent ownership and potential infringement risks of our bladeless fan products, relative to Dyson’s patents.
In the spirit of full transparency and to put all our partners’ and customers’ concerns to rest, this article will lay out the complete, court-verified facts of our long-standing patent legal proceedings, and clearly explain why our bladeless fan products are fully compliant and do not infringe any valid Dyson patents. All claims below are supported by official, final court rulings and patent review decisions, and full documentation is available upon request.
Our Company’s Journey: Defending Fair Intellectual Property Rights Since 2009
Our company’s predecessor, Liye Industrial Co., Ltd., was founded in 2009, with a focus on developing and manufacturing high-quality, accessible bladeless fan products for global consumers. In 2012, we faced repeated patent challenges from Dyson, which forced us to suspend our original business operations. What followed was a years-long legal journey to defend our proprietary technology and validate our non-infringement position in formal Chinese courts.
Landmark 2016 Ruling: Guangdong High People’s Court Confirmed No Infringement
The first critical milestone in our defense came on October 13, 2016, with a final, binding ruling from the Guangdong High People’s Court, the highest judicial authority for intellectual property cases in Guangdong Province.
The court’s core ruling was definitive: the technical features of our products are neither identical nor equivalent to the protected claims of Dyson’s relevant patent. The key differentiator cited in the judgment is that our products do not include a “diffuser located downstream of the impeller” – the core technical feature covered by Dyson’s asserted patent. This ruling legally confirmed that our products do not fall within the protection scope of Dyson’s patent rights, marking a major victory for fair competition in the bladeless fan industry.
2016-2018: Dyson’s Core Bladeless Fan Patent Was Officially Declared Invalid
In August 2016, Liye Industrial filed a petition with the Beijing Intellectual Property Court to invalidate Dyson’s core invention patent for bladeless fans, Patent No. 200810177844.8.
On January 24, 2017, the Patent Reexamination Board of the China National Intellectual Property Administration (CNIPA) issued Review Decision No. 312600, which officially declared Claims 1-13 and 15-17 of Dyson’s Patent No. 200810177844.8 invalid. Dyson appealed this decision to the Beijing High People’s Court, seeking to overturn the invalidation ruling.
On February 23, 2018, after full first-instance and second-instance proceedings, the court issued Administrative Judgment (2017) Jing 73 Xing Chu No. 2830, which rejected Dyson’s appeal in its entirety. The court upheld the invalidation decision, ruling that the relevant claims of Dyson’s patent lacked inventiveness and were therefore invalid. This ruling eliminated the legal basis for Dyson’s core patent assertions against our products.
Clarification of the 2018 Xiamen Case: Full Closure and Proactive Technical Overhaul
We believe in full transparency, so we are openly addressing a single 2018 patent dispute ruling in Xiamen, China, which is occasionally misrepresented by competitors.
On December 21, 2018, a court ruled that a single, discontinued old model of our Bier bladeless fan had a rear air outlet structure that fell within the scope of one of Dyson’s old utility model patents (covering only the rear air outlet ring structure). It is critical to emphasize the following facts about this case:
- This was an isolated case involving only one single old product model and one single utility model patent, not a ruling of mass or ongoing infringement across our product line.
- The case was fully finalized in 2018, 8 years ago, with all ruling obligations fully completed and closed.
- Immediately after the ruling, we fully discontinued production of the product with the involved structure, completed a full mold redesign, and redeveloped and optimized our technology to a proprietary front air outlet structure and air flow solution. This optimized design has since been widely adopted across the industry, under our advocacy.
2020 Beijing High People’s Court Final Ruling: Again Confirmed No Infringement
In 2019, Dyson filed another patent infringement lawsuit against Beijing Tianran Tianqi Technology Co., Ltd., our authorized distributor, alleging that our heating and cooling bladeless fans infringed Dyson’s invention patent for “heating and cooling bladeless fan assembly”, Patent No. ZL201010129960.X.
On August 28, 2020, the Beijing High People’s Court issued a final binding ruling, stating that the legal basis for Dyson’s patent claims no longer existed, and therefore our distributor’s sales of our products did not constitute patent infringement.
Our Commitment to Intellectual Property Compliance
Every statement in this article is backed by official, final court judgments and patent review decisions from China’s top judicial and intellectual property authorities. For over 15 years, we have not only defended our right to fair competition in court, but also continuously invested in proprietary R&D to optimize our bladeless fan technology, ensuring all our products are fully compliant with global intellectual property rules.
We understand that patent compliance is a top priority for our global customers and partners, and we are committed to complete transparency. If you would like to review the full, original court rulings and patent documents referenced in this article, please do not hesitate to contact us at any time via email: admin@angelofan.com.
We are proud to deliver high-quality, innovative, and fully legally compliant bladeless fan products to our customers worldwide, and we look forward to building long-term, trusted partnerships with you.
