Novarc Tech Inc v. Tecnar Automation Ltee

I. Executive Summary and Procedural Information

• Parties & Counsel:
  • Plaintiff: Novarc Technologies, Inc. (British Columbia, Canada)
  • Defendant: Tecnar Automation Ltée (Quebec, Canada)
  • Plaintiff's Counsel: Thompson Hine LLP; Gilliam & Smith LLP
• Case Identification: 2:26-cv-00552, E.D. Tex., 07/06/2026
• Venue Allegations: Venue is alleged based on Defendant Tecnar, a foreign corporation, being subject to personal jurisdiction in the district. Personal jurisdiction is asserted based on Tecnar's business activities, including direct or indirect sales, marketing, and distribution of accused products to customers in Texas, such as PWC Industries, Thermacor Process, and Lindsayca.
• Core Dispute: Plaintiff alleges that Defendant's Rotoweld 3.0 robotic welding system and its associated PerfectPass-iQ software infringe a patent related to automated seam tracking and weld parameter control in robotic pipe welding.
• Technical Context: The technology concerns automated systems for welding two pipe sections together, specifically using a vision system to detect temporary tack welds (stitches) and adjust welding parameters in real-time to ensure a consistent, high-quality final weld.
• Key Procedural History: The complaint alleges that Plaintiff sent a letter to Defendant on May 13, 2025, providing actual notice of the patent-in-suit, explaining the alleged infringement by the Rotoweld 3.0 and PerfectPass-iQ system, and offering a license.

Case Timeline

Date	Event
2018-02-08	'013 Patent Priority Date
2025-05-13	Plaintiff allegedly sent notice letter to Defendant
2025-05-20	U.S. Patent No. 12,304,013 Issued
2026-07-06	Complaint Filed

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

U.S. Patent No. 12,304,013 - "Systems and Methods for Seam Tracking in Pipe Welding"

The patent-in-suit is U.S. Patent No. 12,304,013, issued May 20, 2025 (the "'013 Patent").

The Invention Explained

• Problem Addressed: The patent addresses the challenge of automated robotic pipe welding, particularly when two pipe sections are held together by temporary tack welds, or "stitches" Compl. ¶10 '013 Patent, col. 1:22-25 These stitches can interfere with the automated welding process, requiring a system that can intelligently adapt to their presence '013 Patent, col. 13:13-18
• The Patented Solution: The invention describes a method where a robotic welding system uses a camera to continuously capture images of the weld area as the pipes rotate '013 Patent, col. 2:5-9 A processor analyzes these images to track the seam between the pipes, detect when the welding torch is passing over a stitch, and determine the start and end of that stitch '013 Patent, FIG. 3 In response, the system's controller adjusts welding parameters (e.g., voltage, wire speed, weave) to properly weld over the stitch and then reverts to normal parameters after passing it, ensuring a consistent weld bead '013 Patent, col. 5:61-65 '013 Patent, col. 6:1-3
• Technical Importance: This approach allows for fully automated, high-quality welding of tacked pipes without manual intervention, improving consistency and efficiency in pipe spool fabrication '013 Patent, col. 1:56-60

Key Claims at a Glance

• The complaint asserts at least independent claim 1 of the '013 Patent Compl. ¶13
• The essential elements of independent claim 1 include:
  • A method for controlling a robotic welding system for welding two pipe sections held together by "stitches." The system comprises a torch arm, a controller, a processor, a camera, and a pipe positioner/rotator.
  • Receiving a start signal to begin welding and pipe rotation.
  • Continuously capturing and processing frames from the camera to determine a seam position and track it with the torch arm.
  • Processing frames to detect when the welding torch is over one of the stitches.
  • Determining a "stitch start" and "stitch end" based on this detection.
  • Controlling the system to adjust welding parameters in response to both the determined stitch start and stitch end.
• The complaint reserves the right to assert additional claims Compl. ¶42

III. The Accused Instrumentality

Product Identification

The Rotoweld 3.0 robotic welding system and the associated PerfectPass-iQ software (collectively, the "Accused Products") Compl. ¶13

Functionality and Market Context

• The complaint alleges the Accused Products constitute a "fully integrated design for 1G robotic pipe welding" used for "pipe spool fabricat[ion]" Compl. ¶16 The system is described as using a "LED vision system" and proprietary software to achieve "true automatic welding" Compl. ¶16 Compl. ¶20
• Functionally, the system is alleged to weld two pipe sections that have been prepared with "root tacks or stitches" Compl. ¶17 The PerfectPass-iQ software is alleged to use a camera to detect these tacks and trigger "parameter modification" automatically during the welding process Compl. ¶17 Compl. ¶26 An image from a product demonstration shows the user interface for the PerfectPass-iQ software, which explicitly states that "Detection of a tack triggers parameter modification" Compl. p. 6 The complaint alleges the Accused Products are sold to and used by companies in the United States, including several based in Texas Compl. ¶¶6-7

IV. Analysis of Infringement Allegations

'013 Patent Infringement Allegations

Claim Element (from Independent Claim 1)	Alleged Infringing Functionality	Complaint Citation	Patent Citation
A method for controlling a robotic welding system during automatic welding together of two pipe sections in a spool welding operation wherein the two pipe sections are held in fixed relation to each other by a plurality of stitches...	The accused Rotoweld 3.0 is described as a "robotic welding system" for "pipe spool fabricat[ion]" that operates on pipe sections held together by "stitches" or "tacks."	¶16; ¶17	col. 13:1-12
receiving, by the processor, an arc on signal from the controller which controls the robotic welding system to start the welding operation and controls the positioner to start rotating the two pipe sections;	The Accused Products allegedly begin "true automatic welding" when a user presses a "start" button, which initiates the welding operation and rotation of the pipes via the system's rotators.	¶22	col. 13:31-40
rotating the two pipe sections and the robotic welding system in relation to each other while continuously:	The Rotoweld 3.0 system allegedly uses "rotators" to continuously rotate the pipe sections during the welding process. A video screenshot shows the pipe being rotated from one position to another during welding Compl. pp. 10-11	¶21; ¶23	col. 13:28-31
capturing and buffering a plurality of frames of an interface between the two pipe sections with the camera while the welding operation is ongoing;	The system's "LED vision system," which is akin to a camera, allegedly captures frames of the weld interface throughout the welding process.	¶20; ¶24	col. 13:51-52
processing the plurality of frames to determine a seam position while the welding operation is ongoing;	The PerfectPass-iQ software allegedly processes the captured frames to keep the weld joint centered in the user interface, which suggests determination of the seam's position.	¶25	col. 14:1-3
controlling the robotic welding system to move the torch arm to track the seam position while the welding operation is ongoing;	The welding arm allegedly "will position itself automatically," and the software "continually adjusts the system to center the joint," thereby tracking the seam.	¶18; ¶25	col. 14:30-34
processing the plurality of frames to detect whether the welding torch is over one of the plurality of stitches...; determining a stitch start...; determining a stitch end...	The PerfectPass-iQ software allegedly processes frames to detect a "tack or stitch." Screenshots from a video demonstrate the system's UI indicating "Tack: No" before an event and "Tack: Yes" during an event, followed again by "Tack: No" Compl. pp. 13-15	¶26	col. 14:50-56; col. 15:17-20
controlling the robotic welding system to adjust welding parameters in response to determining the stitch start... and... stitch end...	The complaint provides screenshots showing that upon detection of a stitch, welding parameters such as "Travel Speed," "Wire Speed," and "Oscillation Width" are adjusted, and then readjusted after the stitch is no longer detected.	¶26	col. 14:61-65; col. 15:23-28

• Identified Points of Contention:
  • Scope Questions: The patent claims use the term "stitches" '013 Patent, claim 1 The complaint alleges the accused system operates on "root tacks or stitches" Compl. ¶17 A potential question for the court is whether the term "stitch" as defined and used in the patent is coextensive with the "root tacks" prepared for and processed by the accused system.
  • Technical Questions: Claim 1 requires determining a "stitch start" and a "stitch end" and adjusting parameters in response to each event. The complaint provides visual evidence of the system detecting the presence of a tack and modifying parameters Compl. pp. 13-15 A key evidentiary question may be whether the accused system specifically determines a "start" and an "end" as distinct events triggering separate control actions, as opposed to a single, continuous adjustment for the duration that a "tack" is detected.

V. Key Claim Terms for Construction

• The Term: "stitch"
• Context and Importance: This term is foundational to the asserted claim, as the entire inventive method revolves around detecting and reacting to a "plurality of stitches" holding the pipe sections together. The infringement analysis will depend heavily on whether the "root tacks" used with the accused Rotoweld 3.0 system Compl. ¶17 fall within the scope of "stitch" as understood in the context of the '013 Patent.
• Intrinsic Evidence for Interpretation:
  • Evidence for a Broader Interpretation: The patent specification does not appear to provide a narrow, explicit definition of "stitch," instead using it to describe temporary welds holding pipe sections together for a subsequent, final welding pass '013 Patent, FIG. 1 '013 Patent, col. 13:13-18 This could support an interpretation that covers any form of temporary tack weld, including those used by the accused system.
  • Evidence for a Narrower Interpretation: The figures in the patent depict "stitches" (St) as having a particular visual appearance in the context of the illustrated weld preparation '013 Patent, FIG. 1 '013 Patent, FIG. 3A A party could argue that the term is limited to welds with the specific characteristics shown in the patent's embodiments, potentially raising questions about whether the accused "tacks" share those same characteristics.

VI. Other Allegations

• Indirect Infringement: The complaint alleges that Tecnar induces infringement by instructing and encouraging customers on how to use the Accused Products in an infringing manner through materials such as product brochures, training, and customer support Compl. ¶46 The complaint specifically cites the "Rotoweld 3.0 Product Brochure" as an example of such instructional material Compl. ¶46
• Willful Infringement: The complaint alleges willful infringement based on Tecnar's alleged knowledge of the '013 Patent since at least May 13, 2025, from a notice letter sent by Novarc's counsel Compl. ¶31 Compl. ¶33 The complaint further alleges that Tecnar's infringement has been deliberate since learning of the patent and that continued infringement after the filing of the complaint is "particularly egregious" Compl. ¶40

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

1. A central issue will be one of claim construction and scope: can the term "stitch", as described and claimed in the '013 Patent, be construed to encompass the "root tacks" that the accused Rotoweld 3.0 system is designed to operate on, or does the patent's disclosure imply a more specific technical meaning that creates a distinction?

2. A second key question will be one of evidentiary proof of function: does the evidence show that the Accused Products perform the specific, paired steps of "determining a stitch start" and "determining a stitch end" to trigger distinct parameter adjustments, as recited in claim 1, or does the system apply a more generalized adjustment for the duration of a tack's presence, potentially creating a mismatch with the claim's specific sequence of operations?

3. A third question will concern willfulness: assuming infringement is found, the allegation that Defendant had pre-suit notice of the specific patent and infringing products via a detailed letter Compl. ¶31 raises a significant question of whether any continued infringement was willful, which could expose Defendant to enhanced damages.