Eunsung Global Corp. v. HydraFacial LLC

Eunsung Global Corp. v. HydraFacial LLC involved a patent challenge at the Patent Trial and Appeal Board (PTAB) concerning medical aesthetic equipment. Petitioner Eunsung Global Corp. is a South Korean manufacturer specializing in innovative medical aesthetic devices, including various skin and body care systems. Respondent HydraFacial LLC, a prominent brand under The Beauty Health Company, is a U.S. company known for its patented Vortex-Fusion® technology, which offers non-invasive, three-step hydradermabrasion treatments for skin health. The core of the dispute revolved around hydrodermabrasion systems, with HydraFacial alleging that Eunsung Global's Hydracare H2 and Hydra Touch H2 systems infringed on its patented technologies.

The patent at issue in this IPR was U.S. Patent No. 9,550,052, titled "Console system for the treatment of skin." This patent generally describes an apparatus for treating skin that includes a console with a user input device and a handpiece assembly. This handpiece assembly is designed to exfoliate dead skin cells and extract impurities while simultaneously applying active treatment material to the skin, often using a fluid line system for delivery. Eunsung Global, the Petitioner, initiated an inter partes review (IPR) against this patent, challenging its validity.

The procedural posture of this case was an inter partes review (IPR2025-00445) at the Patent Trial and Appeal Board (PTAB). IPRs are administrative proceedings at the USPTO designed to review the patentability of one or more claims in an issued patent based on prior art consisting of patents or printed publications. This venue is significant as it offers an alternative forum to district court litigation for challenging patent validity, often with different procedural rules, discovery limitations, and a generally faster timeline. In this particular case, the IPR was notable because the Petitioner, Eunsung Global, successfully argued for institution of the IPR by demonstrating a "material error in examination," specifically that the patent examiner had overlooked certain prior art teachings that appeared to disclose features claimed as novel in the patent. The case subsequently settled after institution. The IPR also took place amidst other parallel litigations, including an International Trade Commission (ITC) investigation (337-TA-1408) where HydraFacial had accused Eunsung Global and its distributor Cartessa Aesthetics of infringing the '287 patent (a related HydraFacial patent on hydrodermabrasion systems) and district court proceedings. This IPR linkage is significant as PTAB decisions can impact ongoing or future district court and ITC cases, potentially leading to stays or influencing settlement strategies.

Eunsung Global Corp. v. HydraFacial LLC: Key Legal Developments and Outcome in IPR2025-00445

The primary legal proceeding identified for Eunsung Global Corp. v. HydraFacial LLC concerning U.S. Patent No. 9,550,052 is Inter Partes Review (IPR) case IPR2025-00445 before the Patent Trial and Appeal Board (PTAB). This IPR was initiated by Eunsung Global Corp. to challenge the validity of HydraFacial LLC's patent. While the settlement agreement mentioned a related district court litigation between the parties, specific details, including the case number and full docket, for that particular litigation are not readily available in the public records reviewed. The IPR itself concluded with a settlement.

Key Legal Developments and Outcome:

1. Filing & Initial Pleadings (IPR Petition):

• 2025-01-10: Eunsung Global Corp. filed a Petition for Inter Partes Review (IPR2025-00445) challenging claims 1-17 of U.S. Patent No. 9,550,052.
• The petition successfully argued for institution due to a "material error in examination," specifically noting that the patent examiner overlooked certain teachings in the Karasiuk prior art reference that appeared to disclose allowable features of the claims.

2. Pre-trial Motions of Substance (Institution Decision):

• HydraFacial LLC requested discretionary denial of institution under 35 U.S.C. § 325(d) in IPR2025-00445.
• The Director of the USPTO declined this request, reasoning that "the patent examiner overlooked certain teachings in Karasiuk that appear to disclose the allowable features of the claims." This decision effectively led to the institution of the IPR. The specific date of the institution decision is not explicitly provided in the initial search results, though the "Decision Date" for the IPR's termination is listed as July 31, 2025, implying institution occurred before this.

3. Parallel PTAB IPR/PGR Proceedings and Effect on Litigation:

• 2025-01-10: Eunsung Global Corp. also filed IPR2025-00452, which also settled on July 31, 2025.
• 2024-09-30: Another IPR, IPR2024-01491, was filed by Eunsung Global Corp. against HydraFacial LLC, challenging U.S. Patent No. 11,865,287. Institution was denied on April 11, 2025, with a subsequent denial of Director Review on July 23, 2025. This case involved arguments under the Fintiv factors due to a parallel International Trade Commission (ITC) investigation (Inv. No. 337-TA-1408) and related district court proceedings where HydraFacial asserted the '287 patent. Eunsung had previously exited the ITC proceeding in January 2025 after a consent judgment but continued to challenge patents in IPRs.

4. Settlement, Dismissal, Judgment (Final Disposition):

• 2025-07-29: Petitioner Eunsung Global Corp. and Patent Owner HydraFacial LLC reached an agreement resolving all disputes regarding the '052 patent involved in IPR2025-00445, as well as related district court litigation between the parties.
• 2025-07-30: A Joint Motion to Terminate the IPR proceeding was filed pursuant to 35 U.S.C. § 317 and 37 C.F.R. § 42.74, based on the parties' settlement. The parties also jointly requested that the confidential settlement agreement be treated as business confidential information and kept separate from the public file.
• 2025-07-31: IPR2025-00445 was terminated as settled. The settlement effectively resolved all disputes, and the entire proceeding was dismissed as to both Petitioner and Patent Owner.

Summary of Outcome: The IPR proceeding IPR2025-00445 was instituted after the PTAB Director declined to apply discretionary denial, acknowledging a material error during the original patent examination. The case subsequently settled, and the IPR was terminated on July 31, 2025, due to a global settlement agreement between Eunsung Global Corp. and HydraFacial LLC that also resolved related district court litigation.

Here's an overview of the counsel of record representing Eunsung Global Corp. in IPR2025-00445:

Counsel for Plaintiff(s) Eunsung Global Corp.:

• Jeremy J. Monaldo
  • Role: Counsel
  • Firm: Fish & Richardson P.C., Minneapolis, MN
  • Experience Note: Mr. Monaldo is listed as counsel for Petitioner Eunsung Global Corp. in this IPR. Fish & Richardson has extensive experience in patent litigation and post-grant proceedings before the PTAB.
• Sangki Park
  • Role: Counsel
  • Firm: Fish & Richardson P.C., Minneapolis, MN
  • Experience Note: Mr. Park is listed as counsel for Petitioner Eunsung Global Corp. in this IPR. Fish & Richardson is a leading intellectual property law firm with a strong track record in patent litigation across various forums, including the PTAB.
• Jay Zhu
  • Role: Counsel
  • Firm: Fish & Richardson P.C., Minneapolis, MN
  • Experience Note: Mr. Zhu is listed as counsel for Petitioner Eunsung Global Corp. in this IPR. Fish & Richardson's professionals have deep technical knowledge and routinely handle complex patent cases, including IPRs.

HydraFacial LLC was represented by counsel from Morgan, Lewis & Bockius LLP and ATech Designs, Inc. in IPR2025-00445. The case concluded with a settlement between Eunsung Global Corp. and HydraFacial LLC.

The following attorneys represented HydraFacial LLC:

• Ali S. Razai

  • Role: Lead Counsel
  • Firm: Morgan, Lewis & Bockius LLP, Costa Mesa, CA.
  • Experience: Mr. Razai is experienced in intellectual property litigation, particularly in patent and trade secret disputes, and has represented clients in federal courts and before the PTAB and the International Trade Commission (ITC).

• Benjamin J. Everton

  • Role: Back-up Counsel
  • Firm: Morgan, Lewis & Bockius LLP. Office location typically associated with the firm's main patent litigation hubs, but a specific office for Mr. Everton in relation to this case was not explicitly stated in the provided documents.
  • Experience: Mr. Everton focuses on patent litigation and inter partes reviews.

• Benjamin B. Anger

  • Role: Back-up Counsel
  • Firm: Morgan, Lewis & Bockius LLP. Office location typically associated with the firm's main patent litigation hubs, but a specific office for Mr. Anger in relation to this case was not explicitly stated in the provided documents.
  • Experience: Mr. Anger's practice includes patent litigation and post-grant proceedings before the PTAB.

• Jacob L. Peterson

  • Role: Back-up Counsel
  • Firm: Morgan, Lewis & Bockius LLP. Office location typically associated with the firm's main patent litigation hubs, but a specific office for Mr. Peterson in relation to this case was not explicitly stated in the provided documents.
  • Experience: Mr. Peterson works on patent litigation, particularly in the life sciences and medical device fields, and has experience with PTAB proceedings.

• Alexander B. Stein

  • Role: Back-up Counsel
  • Firm: Morgan, Lewis & Bockius LLP. Office location typically associated with the firm's main patent litigation hubs, but a specific office for Mr. Stein in relation to this case was not explicitly stated in the provided documents.
  • Experience: Mr. Stein's practice involves patent litigation, particularly in district courts and before the PTAB.

• Karl R. Leinsing

  • Role: Attorney for Patent Owner (specific role like lead/backup not specified in the provided documents)
  • Firm: ATech Designs, Inc.
  • Experience: Further specific details on Mr. Leinsing's patent litigation experience or notable past cases were not immediately available in the provided search results.