Willis Electric Co Ltd v. King Of Christmas Inc

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: Willis Electric Co., Ltd. (Taiwan)
  • Defendant: King of Christmas Inc. (Delaware)
  • Plaintiff's Counsel: Tripp Scott, P.A.
• Case Identification: 1:26-cv-25628, S.D. Fla., 08/18/2026
• Venue Allegations: Venue is alleged to be proper based on Defendant's Delaware incorporation and its regular and established places of business within the Southern District of Florida, including specific business addresses in Miami-Dade County, as well as sales directed to customers in the District.
• Core Dispute: Plaintiff alleges that Defendant's "Power Pole" line of pre-lit artificial Christmas trees infringes two patents related to modular tree assembly with internal, rotation-independent electrical connectors.
• Technical Context: The technology simplifies the assembly of pre-lit artificial Christmas trees by enabling automatic electrical connections between stacked tree sections, eliminating the need for consumers to manually connect individual light strings.
• Key Procedural History: The complaint highlights that the patents-in-suit have been previously challenged and their validity sustained in ex parte reexaminations and inter partes review (IPR) proceedings. The complaint also references prior litigation against a third party, Polygroup, which resulted in a jury finding of willful infringement of claim 15 of the '186 patent and a judgment, affirmed on appeal, that ultimately exceeded $79.5 million.

Case Timeline

Date	Event
2010-09-23	Priority Date for '186 and '187 Patents
2011-01-01	Plaintiff Willis Electric introduced its "One Plug Tree" to market
2013-06-04	Issue Date for U.S. Patent No. 8,454,186
2013-06-04	Issue Date for U.S. Patent No. 8,454,187
2026-06-23	Plaintiff sent detailed written notice of infringement to Defendant
2026-08-18	Complaint Filed

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

U.S. Patent No. 8,454,186 - "Modular Lighted Tree with Trunk Electrical Connectors"

Issued: June 4, 2013

The Invention Explained

• Problem Addressed: The patent describes the difficulty and frustration consumers face when assembling conventional pre-lit artificial trees, which require locating and connecting numerous separate electrical plugs between tree sections, a process complicated by the increasing number of lights on modern trees Compl. ¶9 '186 Patent, col. 1:21-38
• The Patented Solution: The invention is a modular artificial tree where individual sections contain internal electrical connectors within their trunk portions. When a user stacks one tree section on top of another, the trunk connectors automatically create both the mechanical and electrical connection, passing power up the tree trunk to the lights on the newly added section. This connection is designed to function regardless of how the sections are rotated relative to one another '186 Patent, abstract '186 Patent, col. 2:38-63
• Technical Importance: This approach automated a key assembly step, significantly reducing the time and complexity for consumers setting up pre-lit artificial trees Compl. ¶10

Key Claims at a Glance

• The complaint asserts dependent claim 15 and independent claim 29, which was substituted for claim 1 during an inter partes review Compl. ¶43 '186 Patent, K1 Certificate, p. 2 The infringement allegations in the complaint body, however, focus on the elements of independent claim 10, from which claim 15 depends Compl. ¶¶44-53
• The essential elements of independent claim 10 include:
  • A lighted artificial tree with at least a first and a second tree portion, each having branches and a light string.
  • Each tree portion has a trunk body and a trunk connector housed within it and connected to its respective light string.
  • The tree portions are mechanically and electrically connectable by coupling their trunk bodies along a common vertical axis.
  • This coupling causes the internal trunk connectors to make an electrical connection.
  • The electrical connection is "independent of the rotational orientation" of the tree portions relative to each other.
• The complaint indicates an intent to rely on other claims as the case develops Compl. ¶43

U.S. Patent No. 8,454,187 - "Modular Lighted Tree"

Issued: June 4, 2013

The Invention Explained

• Problem Addressed: Similar to the '186 Patent, the '187 patent addresses the inconvenience of manually interconnecting light strings on modular artificial trees, a process that can be complex and time-consuming '187 Patent, col. 1:21-38 Compl. ¶9
• The Patented Solution: The '187 patent also discloses a modular tree with an internal power distribution system. It specifies in greater detail the structure of the trunk portions, which have a "trunk wall defining a first trunk interior," a "trunk electrical connector," and a "trunk wiring assembly." It explicitly requires the connection to function in "at least four different rotational orientations" and be independent of those orientations '187 Patent, abstract '187 Patent, col. 3:1-24
• Technical Importance: The invention provides a detailed and robust technical specification for a rotation-agnostic, power-through-the-trunk system for artificial trees Compl. ¶23

Key Claims at a Glance

• The complaint asserts dependent claim 4, which depends on independent claim 1 Compl. ¶65
• The essential elements of independent claim 1 include:
  • A lighted artificial tree with a first and a second tree portion, each with a trunk portion, branches, and a light string.
  • Each trunk portion has a trunk wall, trunk interior, a trunk electrical connector (with a first and second contact), and a trunk wiring assembly.
  • The tree portions are mechanically and electrically coupleable about a central vertical axis.
  • The electrical connection occurs when the contacts of the respective connectors touch.
  • The system is configured to couple in "at least four different rotational orientations" and the electrical connection is "made independent of the rotational orientations."
• The complaint indicates an intent to rely on other claims as the case develops Compl. ¶65

III. The Accused Instrumentality

Product Identification

The accused products are pre-lit artificial Christmas trees sold by King of Christmas that are equipped with a feature marketed as a "Power Pole" or "Quick Set Power Pole" Compl. ¶24 An exemplary product identified is the "6.5-foot Cypress Spruce Artificial Christmas Tree" Compl. ¶28

Functionality and Market Context

• The complaint alleges that the Accused Products consist of separate, pre-lit tree sections that are assembled by stacking them on top of one another Compl. ¶30 The "Power Pole" feature is promoted as a technology that "eliminates the need for the manual stringing of lights" by allowing "power to flow from the base to the top" as sections are stacked, causing the lights to "automatically illuminate" Compl. ¶25
• A snapshot from the Defendant's "Buyer's Guide" shows a consumer placing one tree section onto another to achieve automatic illumination Compl. ¶27 A close-up photograph depicts what the complaint alleges are the mating coaxial electrical contacts at the ends of the accused "Power Pole" trunk sections Compl. ¶28
• The complaint positions the Accused Products as competing directly with Willis Electric's patented "One Plug Tree" technology Compl. ¶19

IV. Analysis of Infringement Allegations

'186 Patent Infringement Allegations

Claim Element (from Independent Claim 10)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
A lighted artificial tree	The Accused Products are lighted artificial trees.	¶44	col. 22:9
a first tree portion including a first trunk portion, a first plurality of branches joined to the first trunk portion, and a first light string	The Accused Products are comprised of a first tree portion that includes a trunk, branches, and a light string.	¶45	col. 22:10-13
the first trunk portion having a first trunk body and a trunk connector, at least a portion of the trunk connector housed within the first trunk body and electrically connected to the first light string	The first tree portion of the Accused Products allegedly includes a trunk body and an internal trunk connector that is connected to the first light string.	¶46	col. 22:14-17
a second tree portion including a second trunk portion, a second plurality of branches joined to the second trunk portion, and a second light string	The Accused Products are also comprised of a second tree portion that includes a trunk, branches, and a light string.	¶47	col. 22:18-21
the second trunk portion having a trunk body and a trunk connector, at least a portion of the trunk connector housed within the second trunk portion and electrically connected to the second light string	The second tree portion of the Accused Products allegedly includes a trunk body and an internal trunk connector that is connected to the second light string.	¶48	col. 22:22-25
wherein the second tree portion is mechanically and electrically connectable to the first tree portion by coupling a lower end of the second trunk body to an upper end of the first trunk body along a common vertical axis...thereby causing the trunk connector...to make an electrical connection...within an interior of the lighted artificial tree	The complaint alleges that when sections of the Accused Products are stacked, the trunk bodies couple along a vertical axis, causing internal connectors to establish an electrical connection.	¶49; ¶51	col. 22:26-35
the electrical connection being made independent of the rotational orientation of the first trunk portion relative the second trunk portion about the common vertical axis	The "Power Pole" electrical connection is alleged to be made regardless of the rotational orientation of the adjoining trunk portions.	¶52	col. 22:35-37
From Claim 15: wherein the trunk connectors of the first and second tree portions form coaxial trunk connectors	The complaint alleges the "Power Pole" trunk connectors are coaxial, supported by visual evidence from Defendant's own materials.	¶53	col. 23:9-11

• Identified Points of Contention:
  • Scope Questions: The dispute may center on whether the Defendant's "Power Pole" mechanism falls within the scope of the term "coaxial trunk connectors" as defined by claim 15 of the '186 Patent. The outcome of the prior litigation against Polygroup, which the complaint states found infringement of this same claim, could be influential in this analysis Compl. ¶21
  • Technical Questions: A potential question for the court is whether the electrical connection in the Accused Products is truly "independent of the rotational orientation" in the manner claimed by the patent, or if there are any functional differences in how this is achieved that might distinguish it from the patented invention.

V. Key Claim Terms for Construction

• The Term: "coaxial trunk connectors"

• Context and Importance: This term appears in dependent claim 15 of the '186 Patent, a claim the complaint notes was successfully asserted in prior litigation Compl. ¶21 Practitioners may focus on this term because its construction will be critical to determining if the "Power Pole" feature of the Accused Products infringes this specific claim. The infringement allegation hinges on the structural and functional characteristics of Defendant's connectors aligning with this term.

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: The specification describes the overall goal as creating a connection independent of rotation, which could support a functional interpretation where any rotation-agnostic, concentric connector qualifies '186 Patent, col. 2:58-63
  • Evidence for a Narrower Interpretation: The patent depicts specific embodiments of the coaxial connector, such as one with a central contact and an outer surface contact '186 Patent, col. 11:21-30 '186 Patent, Fig. 9 A party could argue the term should be limited to structures closely resembling these disclosed examples.

• The Term: "independent of the rotational orientation"

• Context and Importance: This phrase captures the core functional benefit of the invention. Whether the Accused Products achieve this "independence" in the same way as the patent will be a central factual question. The '187 Patent adds specificity by requiring functionality across "at least four different rotational orientations" Compl. ¶72 '187 Patent, col. 21:45-53

• Intrinsic Evidence for Interpretation:

  • Evidence for a Broader Interpretation: The patent's background focuses on the user problem of aligning plugs, suggesting the term could broadly cover any system that eliminates this specific user action '186 Patent, col. 1:53-62
  • Evidence for a Narrower Interpretation: The detailed description links this independence to the specific use of "coaxial-like" connectors where concentric contacts ensure a connection regardless of rotation '186 Patent, col. 9:45-49 This could support an argument that the term requires a specific type of concentric electrical interface.

VI. Other Allegations

• Indirect Infringement: The complaint alleges that King of Christmas induces infringement by providing customers with assembly instructions, buyer's guides, and instructional videos that direct them to assemble and use the Accused Products in a manner that infringes the patents Compl. ¶55 Compl. ¶77
• Willful Infringement: The willfulness allegation is based on Defendant's alleged continued infringement after receiving a detailed written notice letter on June 23, 2026. The complaint states this letter identified the patents, the accused products, provided an element-by-element claim chart for claim 15 of the '186 patent, and described the prior successful litigation against Polygroup Compl. ¶¶34-36 Compl. ¶¶58-61

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

1. Claim Construction and Prior Litigation: A primary issue will be one of claim scope and preclusion: how will the term "coaxial trunk connectors" be construed, and what weight, if any, will the court give to the prior jury verdict and Federal Circuit affirmance that found the same claim valid and infringed by a competitor's similar technology?
2. Willfulness and Damages: A central question will be one of intent: does the detailed pre-suit notice letter-which explicitly referenced the patents, accused products, and a multi-million dollar judgment on the same technology-establish that Defendant's post-notice conduct was "knowing and deliberate," potentially justifying enhanced damages under 35 U.S.C. § 284?
3. Validity Challenge: An evidentiary question will be whether Defendant can present a validity challenge based on prior art or arguments that are materially different from those already considered and rejected by the USPTO during ex parte reexamination and inter partes review proceedings, as noted by the Plaintiff.