Zou v. Individuals Corps Ltd

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: Xinjiang Zou (China)
  • Defendant: The Individuals, Corporations, Limited Liability Companies, Partnerships, and Unincorporated Associates Identified on Schedule “A”
  • Plaintiff’s Counsel: Nicholas S. Lee
• Case Identification: 1:26-cv-01653, N.D. Ill., 02/13/2026
• Venue Allegations: Venue is based on allegations that Defendants operate interactive e-commerce storefronts that purposefully direct commercial activity and sell infringing products to residents of Illinois. The complaint also asserts that because Defendants are foreign and not residents of any single U.S. judicial district, venue is proper in any district.
• Core Dispute: Plaintiff alleges that numerous e-commerce operators infringe a patent related to a lamp holder structure featuring an insulation-piercing electrical connection mechanism.
• Technical Context: The technology simplifies the process of wiring electrical lamp sockets, such as those used in string lights, by eliminating the need for manual wire stripping and screw terminals.
• Key Procedural History: The complaint is filed against a large group of unnamed "Schedule A" defendants, a procedural approach common in cases targeting diffuse networks of online sellers. The plaintiff alleges these defendants operate under multiple aliases to conceal their identities and are part of an interrelated infringing operation.

Case Timeline

Date	Event
2020-11-12	U.S. Patent 11,859,797 Priority Date
2024-01-02	U.S. Patent 11,859,797 Issues
2026-02-13	Complaint Filed

II. Technology and Patent(s)-in-Suit Analysis

U.S. Patent No. 11,859,797 - “Lamp holder structure”

• Patent Identification: U.S. Patent No. 11,859,797, titled “Lamp holder structure,” issued on January 2, 2024 (the “’797 Patent”). (Compl. ¶¶5-6).

The Invention Explained

• Problem Addressed: The patent addresses shortcomings in prior art lamp holders, which it characterizes as having a "complex in structure and inconvenient to wire," often requiring welded or threaded connections for electrical wiring (Compl. ¶8; ’797 Patent, col. 1:26-29).
• The Patented Solution: The ’797 Patent discloses a two-part lamp holder composed of a main body and a top cover (Compl. ¶7; ’797 Patent, col. 4:35-38). The main body contains a "wire placing groove" designed to hold two electrical wires (Compl. ¶7; ’797 Patent, col. 4:43-50). Within this body, two conductive elastic sheets are embedded, each featuring a sharp upward-protruding tip that extends into the wire placing groove (’797 Patent, col. 4:50-col. 5:3). When the top cover is fastened, a "wire pressing part" forces the wires down onto these tips, causing the tips to pierce the wire insulation and establish an electrical connection with the internal wire core (Compl. ¶8; ’797 Patent, col. 5:8-19). The lower ends of these same conductive sheets extend into the bulb installation hole to make contact with a light bulb (Compl. ¶7; ’797 Patent, col. 4:55-57).
• Technical Importance: This integrated insulation-piercing mechanism is presented as a "faster, more reliable, and easily manufacturable solution" for connecting wires to a lamp socket compared to more labor-intensive traditional methods (Compl. ¶8).

Key Claims at a Glance

• The complaint alleges infringement of "at least Claim 1" of the ’797 Patent (Compl. ¶24).
• The essential elements of independent claim 1 include:
  • A lamp holder shell comprising a shell main body and a lamp holder top cover.
  • A bulb installation hole within the shell main body.
  • A wire placing groove formed in an installation part of the shell main body.
  • First and second installation grooves at the bottom of the wire placing groove.
  • First and second "conductive elastic sheets" embedded in the respective installation grooves, with lower ends extending into the bulb installation hole.
  • Each conductive sheet having an upper "elastic sheet tip" that protrudes upwards into the wire placing groove.
  • A "top cover wire pressing part" that aligns with the groove and is configured to press wires onto the sheet tips, piercing their insulation.
  • The first conductive sheet is an integrated structure comprising a fixing part, an elastic contact part, and the tip.
  • A "first elastic sheet locating groove" is formed in the inner wall of the first installation groove for embedding the fixing part of the first conductive sheet.
• The complaint states that its infringement theory is illustrative and reserves the right to modify it (Compl. ¶24).

III. The Accused Instrumentality

Product Identification

• The accused instrumentalities are "materially identical lamp holder product[s]" sold by the various defendants under different "Seller Aliases" on e-commerce platforms like Amazon (Compl. ¶3; Compl. ¶10; Compl. ¶17).

Functionality and Market Context

• The complaint alleges that the accused products contain an "insulation-piercing connector mechanism" that is a "distinctive structural feature" of the patented invention (Compl. ¶26).
• This mechanism is described as having a pair of conductive metal contact sheets with sharpened tips embedded in the lamp holder's shell. When a top cover is pressed down, these tips allegedly "pierce through the insulation of inserted wires and electrically engage the wire cores, establishing a circuit" (Compl. ¶26).
• The complaint alleges that defendants are part of an interrelated network of unauthorized sellers who use tactics to conceal their identities while targeting consumers in the United States, including in Illinois (Compl. ¶11; Compl. ¶12; Compl. ¶17).

IV. Analysis of Infringement Allegations

No probative visual evidence provided in complaint.

• Claim Chart Summary: The complaint does not include a claim chart exhibit, but it provides a narrative infringement theory for Claim 1 (Compl. ¶26), which is summarized below.

Claim Element (from Independent Claim 1)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
a lamp holder shell (1) ... comprises a shell main body (2) and a lamp holder top cover (3)	The accused products are described as a lamp holder with a shell and a top cover.	¶26	col. 7:42-46
a wire placing groove (23) ... formed in the middle of the main body installation part (22)	The accused product's shell has a structure for inserting wires.	¶26	col. 7:53-58
a first conductive elastic sheet (4) ... a second conductive elastic sheet (5)	The accused products contain "a pair of conductive metal contact sheets."	¶26	col. 7:63-col. 8:1
the upper end of the first conductive elastic sheet (4) is provided with a first elastic sheet tip (41) ... the upper end of the second conductive elastic sheet (5) is provided with a second elastic sheet tip (51)	The conductive sheets have "sharpened tips."	¶26	col. 8:3-10
a top cover wire pressing part (31) ... presses the two wires downwards, the first elastic sheet tip (41) ... pierces through an insulating layer of one wire ... and the second elastic sheet tip (51) ... pierces through an insulating layer of the other wire	"When the lamp holder's top cover is pressed down during use, those contact tips pierce through the insulation of inserted wires and electrically engage the wire cores."	¶26	col. 8:16-29
a first elastic sheet locating groove (242) is formed in the inner wall of the first installation groove (241), and the edge part of the first elastic sheet fixing part (42) ... is embedded in the first elastic sheet locating groove	The conductive sheets are "embedded in the lamp holder's shell."	¶26	col. 8:39-44

• Identified Points of Contention:
  • Structural Questions: The complaint's infringement allegations are described at a high level (Compl. ¶26). A central point of contention may be whether the accused products contain the highly specific structures required by Claim 1. For instance, the analysis will question whether the accused products have a distinct "first elastic sheet locating groove" for embedding the conductive sheet, or if they use a different assembly or fastening method.
  • Factual Questions: Given the defendants are numerous online sellers, a key factual question will be whether the plaintiff can demonstrate that each accused product sourced from each defendant practices every limitation of the asserted claim, or if there are material variations between the products offered by different sellers.

V. Key Claim Terms for Construction

• The Term: "conductive elastic sheet"

• Context and Importance: This term is central to the invention's mechanism for both piercing the wire and making contact with the bulb. Practitioners may focus on this term because the "elastic" property could be a point of non-infringement if a defendant's product uses a rigid conductor. The construction will determine whether a simple metal contact, without any specified spring-like quality, falls within the claim's scope.

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: The claims do not specify a particular material or degree of elasticity, referring generally to a "conductive elastic sheet" (’797 Patent, col. 7:63-65). This may support a construction covering any conductive material that is not perfectly rigid.
  • Evidence for a Narrower Interpretation: The specification discloses a preferred embodiment where "the first conductive elastic sheet 4 and the second conductive elastic sheet 5 are copper elastic sheets respectively" (’797 Patent, col. 4:64-66). A defendant may argue this disclosure, combined with the term "elastic contact part" used to describe the portion contacting the bulb, limits the term to a material with spring-like properties sufficient to maintain consistent contact.

• The Term: "locating groove"

• Context and Importance: This term defines a specific structural feature for positioning and securing the conductive sheet within the lamp holder body. A literal infringement finding depends on the presence of a corresponding structure in the accused products.

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: The patent describes the function of this groove as being where "the edge part of the first elastic sheet fixing part ... is embedded" (’797 Patent, col. 8:41-44). A plaintiff could argue that any channel, slot, or recess that performs this embedding and locating function meets the definition.
  • Evidence for a Narrower Interpretation: The figures depict specific grooves (242, 252) formed on the inner walls of the installation grooves (’797 Patent, fig. 5). A defendant could argue that the term should be limited to a structure conforming to this depicted embodiment, rather than any feature that generally serves to "locate" the sheet.

VI. Other Allegations

• Indirect Infringement: The complaint does not contain specific factual allegations supporting claims of induced or contributory infringement, focusing instead on direct infringement through acts of making, using, selling, and importing (Compl. ¶25). However, the prayer for relief seeks to enjoin "aiding, abetting, contributing to, or otherwise assisting anyone in infringing" the ’797 Patent (Compl., prayer A).
• Willful Infringement: The complaint alleges that defendants' infringement has been and continues to be willful (Compl. ¶29). This allegation is based on alleged knowledge of the ’797 Patent "at least through Plaintiff's patent markings, online notice, or prior communications" or through deliberate avoidance of such knowledge (Compl. ¶29).

VII. Analyst’s Conclusion: Key Questions for the Case

• A central issue will be one of structural proof: can the plaintiff demonstrate through discovery that the accused products, sourced from a diffuse network of online sellers, possess the specific and detailed structural limitations of Claim 1, particularly the "locating groove" for embedding the conductive sheet and the fully "integrated" nature of the sheet's components?
• A key procedural question will be one of joinder and enforcement: will the court agree that the defendants' alleged sale of "materially identical" products constitutes a single "series of transactions or occurrences" sufficient to justify joining numerous, and allegedly anonymous, foreign e-commerce operators in a single action, and can the plaintiff effectively obtain discovery from and enforce a judgment against such entities?