Zaxcom Inc

Zaxcom Inc., a New Jersey-based operating company renowned for its innovative professional audio equipment, including digital recording wireless systems and multitrack recorders, has filed a patent infringement lawsuit against Rode Microphones, LLC and its parent company, Freedman Electronics Pty Ltd.. Zaxcom's patented technology, recognized by the Academy of Motion Picture Arts and Sciences and the Television Academy, focuses on eliminating lost audio in film, television, and broadcast production through reliable wireless transmission and integrated recording. The specific accused products or technology are described as Rode Microphones' wireless recording microphone technology, which allegedly infringes Zaxcom's intellectual property in this specialized audio field.

The asserted patent in this litigation is US Patent 10,276,207, which broadly covers systems and methods for wireless recording microphone technology, particularly for professional audio applications. This patent aims to address the challenges of wireless audio transmission by enabling simultaneous recording and transmission, thereby safeguarding against audio loss due to signal interference or dropouts. The litigation is currently ongoing in the District of Delaware, case number 1:23-cv-01245. While initial filings mentioned Judge John F Murphy, later docket entries indicate that District Judge Colm Felix Connolly is presiding over the case. The District of Delaware is a common venue for patent infringement cases due to its specialized expertise in patent law and efficient case management.

This case is notable due to the ongoing parallel inter partes review (IPR) challenges initiated by Rode Microphones, LLC and Freedman Electronics Pty Ltd against Zaxcom's patents, including other related patents. These IPRs seek to invalidate Zaxcom's core patents covering its wireless recording microphone technology. Zaxcom has previously experienced IPR challenges from another competitor, Lectrosonics, Inc., related to similar technology, highlighting a pattern of defensive maneuvers by accused infringers in this industry. The outcome of this litigation and the associated IPRs could have a significant impact on the competitive landscape of professional wireless audio recording technology.

Zaxcom Inc. filed the patent infringement lawsuit against Rode Microphones, LLC and Freedman Electronics Pty Ltd. on October 30, 2023, in the District of Delaware, case number 1:23-cv-01245. The asserted patent is US Patent 10,276,207.

Key Legal Developments and Outcome:

1. Filing & Initial Pleadings:

• Complaint Filed: Zaxcom, Inc. filed its initial complaint on October 30, 2023.
• Service of Complaint: Rode Microphones, LLC was served with the original complaint on December 4, 2023. Freedman Electronics Pty Ltd was served with the original complaint on April 12, 2024.
• Amended Complaint: On November 14, 2024, Zaxcom filed an Amended Complaint.

2. Pre-trial Motions of Substance:

• Motion to Stay Pending IPR: Petitioners (Rode Microphones, LLC and Freedman Electronics Pty Ltd) filed a motion to stay the district court litigation, which was denied on July 8, 2025. The denial was "without prejudice," meaning it could be refiled if circumstances change materially, particularly if the PTAB institutes another IPR.

3. Claim Construction (Markman) Outcomes:

• On February 24, 2025, Judge Murphy issued an order regarding the parties' joint claim construction chart. The court concluded that it would not be necessary to narrow the asserted claims before the claim construction process was completed, finding the remaining disputes commensurate with the case scope and fairly straightforward.

4. Discovery Milestones:

• An initial pretrial videoconference was scheduled for May 24, 2024.
• The parties were ordered to exchange initial disclosures under Fed. R. Civ. P. 26(a) on or before May 10, 2024, and discovery was set to begin on May 10, 2024, if not already started.

5. Parallel PTAB IPR Proceedings:
Rode Microphones, LLC and Freedman Electronics Pty Ltd have initiated several Inter Partes Reviews (IPRs) challenging Zaxcom's patents, including the '207 patent at issue in this litigation, as well as related patents.

• IPR2025-00232 (Challenging US Patent 10,276,207): This IPR was filed on December 4, 2024, by RØDE Microphones, LLC and Freedman Electronics Pty Ltd against Zaxcom, Inc., challenging claims 17-19, 21-23, 33, 34, 59, 60, and 66 of the '207 patent. The petitioners argued that institution should not be barred by discretionary denial, noting that the district court litigation was in its early stages with no trial date set and summary judgment briefing not due until April 2026, making a trial before the IPR's final written decision (FWD) in mid-2026 unlikely. The petition also heavily relied on arguments of collateral estoppel based on adverse findings in prior "Lectrosonics IPRs" involving related Zaxcom patents and the same key prior art, which resulted in unpatentability decisions affirmed by the Federal Circuit.
• Other Related IPRs: Rode and Freedman also filed IPRs challenging other Zaxcom patents asserted in the district court case: U.S. Patent No. 7,711,443 B1 (IPR2025-00230) and U.S. Patent No. 7,929,902 B1 (IPR2025-00231), and U.S. Patent No. 12,051,444 B2 (IPR2025-00557, related to the '444 patent).
• PTAB Decisions on Related Patents: In an IPR related to US Patent No. 12,051,444 (IPR2025-00557), the Patent Owner's request for discretionary denial was denied, and the petition was referred to the Board. However, an inter partes review was not instituted for the '444 patent for reasons detailed in a September 30, 2025, decision.
• Effect of Parallel Proceedings: The denial of the motion to stay in the district court on July 8, 2025, indicated that prospects for simplification were "too uncertain at this time," but left open the possibility of a future stay if the situation changes, for example, if the PTAB institutes IPR2025-00557.
• Previous Lectrosonics IPRs: The current IPRs by Rode and Freedman draw parallels to earlier IPR challenges by Lectrosonics, Inc. against related Zaxcom patents, some of which resulted in claims being found unpatentable and substitute claims being added. These prior PTAB decisions were affirmed by the Federal Circuit.

6. Present Posture:
The litigation is ongoing in the District of Delaware, with District Judge Colm Felix Connolly presiding. The case is still in the pre-trial phase, with claim construction ongoing and no trial date yet set. The parallel IPR proceedings continue to be a significant factor in the overall trajectory of the case.

In the patent infringement case of Zaxcom Inc. v. Rode Microphones, LLC et al., Zaxcom Inc. is represented by both lead and local counsel.

Lead Counsel:

• Firm: Panitch Schwarze Belisario & Nadel LLP (Philadelphia, PA and Wilmington, DE offices)
  • Panitch Schwarze is an intellectual property law firm with expertise in patent litigation, prosecution, and post-grant proceedings before the USPTO. They have received national and metropolitan rankings for intellectual property and patent litigation.
  • Attorneys:
    • Philip L. Hirschhorn (Lead Counsel): An experienced trial lawyer specializing in patent litigation and other intellectual property proceedings, including post-grant proceedings before the PTAB.
    • Dennis J. Butler (Lead Counsel): Works with innovators to protect new developments and enforce existing intellectual property rights, with specific experience in medical device inventions and litigation in the District of Delaware and the Eastern District of Pennsylvania.

Local Counsel:

• Firm: Morris, Nichols, Arsht & Tunnell LLP (Wilmington, DE office)
  • Morris Nichols is a preeminent Delaware-based law firm with one of the leading intellectual property litigation practices in the United States, particularly known for its patent litigation experience in the District of Delaware. They have been counsel in a significant portion of intellectual property cases in the District of Delaware.
  • Attorneys:
    • Jack B. Blumenfeld (Local Counsel): With 40 years of patent litigation experience, he is recognized as the "dean of the Delaware IP bar." He has represented major companies in patent infringement actions across various technologies.

Defendant Rode Microphones, LLC and Freedman Electronics Pty Ltd are represented by lead and local counsel.

Lead Counsel:

• Firm: DeMarco Law, PLLC (New York, NY and Boston, MA offices)
  • Attorney: Michael J. DeMarco (Lead Counsel): A trial lawyer with extensive experience in civil litigation, including intellectual property and commercial disputes. He has been recognized as a top litigator in America and has represented various entities in complex cases, including pharmaceutical manufacturers and sovereign nations.

Local Counsel:

• Firm: Morris, Nichols, Arsht & Tunnell LLP (Wilmington, DE office)
  • Attorney: Jack B. Blumenfeld (Local Counsel): Known as the "dean of the Delaware IP bar," he has over 40 years of patent litigation experience across various technologies, including pharmaceuticals, biotechnology, software, and telecommunications. He has represented major companies such as Pfizer, Amgen, Intel, Johnson & Johnson, Comcast, and Google in high-profile IP disputes.

It is noted in court documents that counsel for Rode Microphones, LLC confirmed in a December 8, 2023, letter to Zaxcom's counsel that he represents both Rode Microphones, LLC and Freedman Electronics Pty Ltd. in this dispute.