Defendant
1 case as defendant.
Willow Blossom Holdco Ltd is a UK-registered company that operates as a subsidiary of Willow Innovations Inc., a US firm. In March 2025, Willow Blossom Holdco Ltd acquired substantially all the business and assets of Chiaro Technology Limited, which traded as Elvie. This acquisition included all 178 employees of Elvie.
The company's operations are primarily centered around femtech products, specifically wearable breast pumps and other innovative products for mothers focused on feeding, sleeping, and maternal recovery, through its acquisition of the Elvie brand. The acquired patent portfolio reflects this focus, with patents related to "Wearable Breast Pump System" technology.
Willow Blossom Holdco Ltd's patent litigation posture is currently defensive. The company is listed as a defendant in one tracked case, "Unified Patents v. Willow Blossom Holdco Ltd," before the Patent Trial and Appeal Board (PTAB). This inter partes review, also referred to in a related filing as "Shenzhen Root Technology Co., Ltd. v. Willow Blossom Holdco Limited," challenges claims of U.S. Patent No. 11,806,454 B2, which covers a "Wearable Breast Pump System". Unified Patents is known for initiating IPRs to challenge patents, often against non-practicing entities. Willow Blossom Holdco Ltd and Willow Innovations, Inc. acquired this challenged patent from its original owner, Chiaro Technology Ltd, after the petition for review was filed.
An Inter Partes Review initiated by Unified Patents challenging the validity of US patent 11813381, which has been instituted by the PTAB and is currently pending.