3:26-cv-00913
Puttshack Ltd v. 501 Entertainment Ltd
I. Executive Summary and Procedural Information
- Parties & Counsel:
- Plaintiff: Puttshack LTD. (U.K.)
- Defendant: 501 Entertainment, Ltd. (U.K.)
- Plaintiff's Counsel: Johnson Evans & Headrick, P.C.; Neal, Gerber & Eisenberg LLP
- Case Identification: 3:26-cv-00913, M.D. Tenn., 07/01/2026
- Venue Allegations: Venue is alleged based on the Defendant having offered for sale, used, or imported the accused product in the United States and within the Middle District of Tennessee, including through promotional activities at a trade show in Nashville.
- Core Dispute: Plaintiff alleges that Defendant's "Interactive Mini-Golf" product infringes a patent related to a standalone, multi-game miniature golf structure that uses sensors and a digital display to create dynamic gameplay.
- Technical Context: The technology lies in the "competitive socializing" or "eatertainment" market, which integrates interactive digital experiences with physical games like miniature golf to enhance replayability and fit within smaller commercial venues.
- Key Procedural History: The complaint does not reference prior litigation or administrative proceedings. It does allege that Defendant is "usurping Plaintiff's first-in-time market position," which may be raised in arguments concerning irreparable harm and damages.
Case Timeline
| Date | Event |
|---|---|
| 2023-09-11 | '425 Patent Priority Date |
| 2024-10-15 | '425 Patent Issue Date |
| 2026-07-01 | Accused Product Promotional Activity at Bowl Expo Begins |
| 2026-07-01 | Complaint Filing Date |
| 2026-07-02 | Accused Product Promotional Activity at Bowl Expo Ends |
II. Technology and Patent(s)-in-Suit Analysis
U.S. Patent No. 12,115,425 - "Standalone and Multigame Miniature Golf Structure"
- Patent Identification: U.S. Patent No. 12,115,425 ("Standalone and Multigame Miniature Golf Structure"), issued October 15, 2024 (the "'425 Patent").
The Invention Explained
- Problem Addressed: The patent's background section describes traditional miniature golf courses as having a large physical footprint, being expensive to maintain, and offering limited replay value due to static, unchangeable obstacles and hole configurations '425 Patent, col. 1:36-53
- The Patented Solution: The invention is a self-contained, standalone miniature golf game structure that replaces a large course with a single putting surface aimed at a large digital screen '425 Patent, Fig. 1 Sensors are positioned at the rear end of the putting surface, below the screen, to detect the lateral position where a golf ball crosses '425 Patent, col. 2:2-4 A processor uses this sensor data to determine if the ball's path aligns with virtual targets displayed on the screen, allowing for a variety of different games and scoring outcomes on a single physical apparatus '425 Patent, abstract '425 Patent, col. 2:8-19
- Technical Importance: This approach enables complex, varied, and dynamic miniature golf games to be played in a compact space, making it suitable for venues like arcades, bars, and casinos where traditional courses would be impractical '425 Patent, col. 7:35-40
Key Claims at a Glance
- The complaint asserts infringement of at least Claim 1 of the '425 Patent Compl. ¶12
- The essential elements of independent Claim 1 are:
- A putting surface including a front end and a rear end;
- One or more sensors configured to detect lateral positions at which balls cross the rear end;
- A digital display screen positioned above the one or more sensors and adjacent to the rear end to align vertically with the rear end of the putting surface;
- Memory to store instructions for a plurality of miniature golf games; and
- One or more processors configured to execute a series of functions for each shot, including displaying targets, identifying the ball's lateral crossing position via the sensors, determining if the position aligns with a target, and generating a score based on that alignment.
- The complaint reserves the right to assert other claims, which may include dependent claims Compl. ¶11
III. The Accused Instrumentality
Product Identification
Defendant's "Mini-Golf game product," marketed as "Interactive Mini Golf" Compl. ¶11 Compl. Fig. 5
Functionality and Market Context
The complaint alleges the Accused Instrumentality is an "interactive golf game system" that provides a "next-generation interactive mini golf experience played on a single green" Compl. ¶12 Compl. Fig. 5 Visual evidence included in the complaint depicts a physical putting green structure terminating at a large, vertical digital screen that displays game graphics, targets, and scores Compl. Fig. 1 This image shows the overall system of the accused product, including a putting green and a large vertical display. Defendant's marketing materials claim it allows for "all the fun, all in one place," which aligns with the patent's goal of a compact, multi-game system Compl. Fig. 5 The complaint alleges the product is offered for sale in the U.S. through trade shows and online marketing Compl. ¶¶13-14
IV. Analysis of Infringement Allegations
The complaint alleges that the Accused Instrumentality infringes at least Claim 1 of the '425 Patent Compl. ¶12 Although the complaint references a claim chart in an unprovided "EXHIBIT B," the core allegations can be summarized from the complaint's text and visual aids.
'425 Patent Infringement Allegations
| Claim Element (from Independent Claim 1) | Alleged Infringing Functionality | Complaint Citation | Patent Citation |
|---|---|---|---|
| a putting surface including a front end and a rear end; | The accused product includes a physical putting green where players putt a golf ball. | ¶11; Fig. 1 | col. 1:66-2:2 |
| one or more sensors configured to detect lateral positions at which balls cross the rear end; | The complaint alleges infringement of this element, inferring the presence and function of sensors from the product's interactive nature and scoring system. | ¶12; ¶15 | col. 2:2-4 |
| a digital display screen positioned above the one or more sensors and adjacent to the rear end to align vertically with the rear end of the putting surface; | The accused product features a large vertical digital screen at the far end of the putting surface. | ¶12; Fig. 1; Fig. 2 | col. 2:5-8 |
| memory to store instructions for a plurality of miniature golf games; and | The interactive and multi-game nature of the accused product, as shown in marketing materials, implies the existence of memory storing game instructions. | ¶12; Fig. 5 | col. 2:8-9 |
| one or more processors that, for each shot...are configured to...display one or more putting targets...identify...a lateral position...determine whether the lateral position...aligns vertically...and generate a score... | The accused product's screen displays changing game elements and scores, which the complaint alleges fulfills the claimed processing steps. A provided screenshot shows a game interface with player scores and bonus elements. | ¶12; Fig. 6 | col. 2:9-19 |
Identified Points of Contention
- Scope Questions: The dispute may turn on the construction of "detect lateral positions." The patent specification describes embodiments with discrete "ball-detection lanes" as well as embodiments with lidar sensors '425 Patent, col. 9:43-51 '425 Patent, col. 16:29-34 A question for the court will be whether the claim term is limited to a specific type of detection system or covers any means of determining the ball's cross-sectional path.
- Technical Questions: A key evidentiary challenge for the Plaintiff will be demonstrating how the accused product's internal components function. The complaint relies on external observations and marketing materials to allege the presence and operation of the claimed "sensors" and "processors." The actual mechanism used by the Defendant to detect ball position and generate a score will be a central factual dispute.
V. Key Claim Terms for Construction
The Term: "detect lateral positions"
Context and Importance: This term is the technological core of the asserted claim, defining the mechanism that links the physical action of putting the ball to the digital game. Its interpretation will determine whether the Defendant's sensing technology, once revealed in discovery, falls within the scope of the patent. Practitioners may focus on this term because its breadth is critical to the infringement analysis.
Intrinsic Evidence for Interpretation:
- Evidence for a Broader Interpretation: The claim language "lateral positions" is plural and not explicitly limited, suggesting it could cover any system capable of distinguishing multiple locations across the rear of the putting surface. The specification's disclosure of a "lidar sensor" could support a broader reading that includes continuous or high-resolution position detection '425 Patent, col. 16:29-34
- Evidence for a Narrower Interpretation: The specification heavily details embodiments using a "plurality of ball-detection lanes" defined by physical walls and monitored by individual fork sensors '425 Patent, col. 8:6-15 '425 Patent, Figs. 10-13 A defendant may argue that "lateral positions" should be construed more narrowly in light of these specific, repeatedly emphasized embodiments.
The Term: "align vertically"
Context and Importance: This term connects the detected physical "lateral position" of the ball with the virtual "putting targets" on the screen. The required precision of this alignment will be crucial for determining whether a "hit" occurs under the claim.
Intrinsic Evidence for Interpretation:
- Evidence for a Broader Interpretation: The patent states the "digital display screen is aligned vertically with the sensor assembly," which suggests a general planar correspondence '425 Patent, col. 9:22-26 This could support an interpretation where general overlap between the ball's path and a target constitutes alignment.
- Evidence for a Narrower Interpretation: Figures like Figure 31 show "digital lanes" on the screen that directly correspond to the physical "ball-detection lanes" of the sensor assembly '425 Patent, Fig. 31 '425 Patent, col. 8:12-19 This could support a narrower construction requiring the lateral position to fall within a specific, defined digital zone corresponding to a physical sensor zone.
VI. Other Allegations
- Willful Infringement: The complaint alleges that Defendant's infringement is and has been willful Compl. ¶17 The basis for this allegation is Defendant's alleged awareness of the '425 Patent prior to suit, based on its promotional activities for the Accused Instrumentality, and its continued infringement after receiving notice via the complaint Compl. ¶17 The complaint also asserts this is an exceptional case warranting enhanced damages and attorneys' fees Compl. ¶18
VII. Analyst's Conclusion: Key Questions for the Case
An Evidentiary Question of Technical Operation: A primary issue for the court will be factual: what technology does the Defendant's product actually use to register a shot? The case will likely depend on evidence obtained in discovery that reveals whether the accused system contains "sensors configured to detect lateral positions" at the rear of the putting surface, as required by Claim 1, or if it operates on a different technical principle.
A Claim Construction Question of Scope: The dispute may center on the definition of "detect lateral positions." The central legal question will be whether this term, in the context of the '425 patent, is broad enough to cover various sensing methods or if it is implicitly limited by the specification's detailed descriptions of a "ball-detection lane" architecture. The outcome of this construction will be critical in defining the patent's protective scope.