Envoy Medical Expands Patent Portfolio by Securing Additional European Patent for Breakthrough Cochlear Implant Technology

Patent covers advanced signal processing for middle ear sensors, further advancing the Company's position in leveraging the ear for fully implanted hearing devices

White Bear Lake, Minnesota--(Newsfile Corp. - September 19, 2025) - Envoy Medical® Inc. (NASDAQ: COCH) ("Envoy Medical"), a hearing health company focused on developing innovative, fully implanted hearing solutions, today announced that it has received an Issue Notification from the European Patent Office and has been granted European Patent No. 4338791 which became effective September 17, 2025. The newly issued European patent strengthens Envoy Medical's global patent portfolio following recent issuances in the United States, Australia, and Hong Kong.

The title of the patent is "Implantable Cochlear System with Integrated Components and Lead Characterization" and relates to sophisticated systems and methods for compensating for variability in a middle ear sensor. Specifically, it covers the use of analog and digital signals from a middle ear sensor representing received stimulus signals. The digital filter can be adjusted to normalize the frequency response of the digitally filtered signals with respect to the stimulus signals.

"This latest patent reflects our continued innovation in fully implanted hearing technology that is designed to work with the body's natural anatomy. We believe these additional patents strengthen our position and continue to create shareholder value by expanding our global patent portfolio. We are not only protecting our groundbreaking innovations but also supporting our mission to deliver life-changing, fully implantable solutions to the people around the world who experience disabling hearing loss," said Brent Lucas, CEO of Envoy Medical.

Envoy Medical's fully implanted cochlear implant technology, including the investigational Acclaim® Cochlear Implant, is designed to eliminate the need for external microphones and wearable hardware, instead utilizing a sensor designed to leverage the natural ear. The company believes this technology represents a significant shift in the treatment paradigm for patients with severe to profound sensorineural hearing loss.

For more information about Envoy Medical's innovation pipeline and intellectual property portfolio, visit www.envoymedical.com.

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About Envoy Medical, Inc.

Envoy Medical (NASDAQ: COCH) is a hearing health company focused on providing innovative technologies across the hearing loss spectrum. Envoy Medical has pioneered one-of-a-kind, fully implanted devices for hearing loss, including its fully implanted Esteem® active middle ear implant, commercially available in the U.S. since 2010, and the fully implanted Acclaim® cochlear implant, an investigational device. Envoy Medical is dedicated to pushing hearing technology beyond the status quo to improve access, usability, compliance, and ultimately quality of life.

About the Fully Implanted Acclaim® Cochlear Implant

We believe the fully implanted Acclaim Cochlear Implant ("Acclaim CI") is a first-of-its-kind hearing device. Envoy Medical's fully implanted technology includes a sensor designed to leverage the natural anatomy of the ear instead of a microphone to capture sound.

The Acclaim CI is designed to address severe to profound sensorineural hearing loss that is not adequately addressed by hearing aids. The Acclaim CI is expected to be indicated for adults who have been deemed adequate candidates by a qualified physician.

The Acclaim Cochlear Implant received the Breakthrough Device Designation from the U.S. Food and Drug Administration (FDA) in 2019.

CAUTION The fully implanted Acclaim Cochlear Implant is an investigational device. Limited by Federal (or United States) law to investigational use.

About the Esteem® Fully Implanted Active Middle Ear Implant (FI-AMEI)

The Esteem fully implanted active middle ear implant (FI-AMEI) is the only FDA-approved, fully implanted* hearing device for adults diagnosed with moderate to severe sensorineural hearing loss allowing for 24/7 hearing capability using the ear's natural anatomy. The Esteem FI-AMEI hearing implant is invisible and requires no externally worn components and nothing is placed in the ear canal for it to function. Unlike hearing aids, you never put it on or take it off. You can't lose it. You don't clean it. The Esteem FI-AMEI hearing implant offers true 24/7 hearing.

*Once activated, the external Esteem FI-AMEI Personal Programmer is not required for daily use.

Important safety information for the Esteem FI-AMEI can be found at: https://www.envoymedical.com/safety-information.

Additional Information and Where to Find It

Copies of the documents filed by Envoy Medical with the SEC may be obtained free of charge at the SEC's website at www.sec.gov.

Click here for important information.