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River Sonic Solutions

Expert Witnessing and Technical Consulting in imaging, signal processing and electronics

Expert Witnessing

Expert Witness Patents Medical Devices
Dr. Chris Daft specializes in providing litigation support with a focus on Patent and Trade Secret areas of intellectual property. His experience is evidenced by participation in 13 depositions and testimony in 5 jury and bench trials. His expertise spans a range of technologies including wearable devices for both medical and consumer use, electronics, micro-mechanical systems, medical imaging, biometric security, and hearing aids. Dr. Daft also has experience in malpractice and product liability cases related to medical devices. A key aspect of Dr. Daft’s work is his ability to simplify complex technical matters for the finder of fact, making them accessible and understandable. This skill has been recognized by courts for its effectiveness in aiding the legal process. Dr. Daft’s background in patent prosecution encompasses the medical devices and artificial intelligence fields, where he has managed patent strategies for both large corporations and smaller entities. His academic achievements include publication in peer-reviewed journals and teaching engineering at the university level. His legal experience extends to involvement in Federal District Courts, International Trade Commission (ITC) section 337 investigations, and Patent Trial and Appeal Board (PTAB) proceedings. Dr. Daft provides services to plaintiffs and defendants roughly equally. Available upon request are references from prior retaining counsel, attesting to Dr. Daft’s contributions to their cases. His case work includes a variety of topics such as:
  • X-ray tomosynthesis for breast cancer diagnosis.
  • Employment law within the technology sector.
  • Wearable electronic devices for physiological measurement.
  • Aesthetic systems for body contouring.
  • Ultrasonic imaging systems’ signal processing.
  • Biometric security devices, encompassing both hardware and software.
  • Catheter systems for hypertension treatment.
  • Security systems for mobile phones.
  • Optical diagnostic systems for glaucoma.
  • Architecture and microelectronic design of point-of-care imaging systems.
  • Surgical device technology.
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Technical Consulting

transcranial
The ultrasonic field from a transducer placed on the scalp and performing transcranial neuromodulation. Simulation by River Sonic Solutions; full paper here.
River Sonic Solutions works with a network of partners to provide comprehensive solutions in the areas of:
  • Ultrasound
  • MEMS (micro-electro-mechanical systems)
  • Enabling microelectronics
Located in the San Francisco Bay Area, we assist clients locally and worldwide, from start-ups to the largest corporations, including multi-nationals. Learn More…

Associations and Partnerships

Ultraonics, Ferroelectrics and Frequency Control Society
university-arizona-center-consciousness-studies

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Dr. Chris Daft

Dr. Chris Daft

Dr. Chris Daft is an award winning, Oxford Educated scientist whose areas of expertise include medical imaging, electronics, semiconductors, medical devices, sensors, MEMS, signal processing and image processing. Dr. Daft has experience in industries and applications including medical devices, imaging, consumer electronics, biometric security, and electrical power delivery. Learn more...

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Expert Witnessing in AI, medical devices, MEMS and electronics

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riversonicsolns RiverSonic Solutions @riversonicsolns ·
September 30, 2025

AI scientists incoming:

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riversonicsolns RiverSonic Solutions @riversonicsolns ·
September 30, 2025

And I only use Windsurf and Sonnet 4.5...

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riversonicsolns RiverSonic Solutions @riversonicsolns ·
September 28, 2025

An informed take on the near future of AI: https://www.julian.ac/blog/2025/09/27/failing-to-understand-the-exponential-again/

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riversonicsolns RiverSonic Solutions @riversonicsolns ·
September 25, 2025

The core innovation relies on OSFET gain cells (early stage) but if this came to pass it would change the world

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riversonicsolns RiverSonic Solutions @riversonicsolns ·
September 20, 2025

Analog computing for speech recognition - this is beautiful

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Latest News

Ambient: blockchain and AI colliding

Relevance of the Ambient blockchain As an expert witness working both in AI and blockchain, I have been struck by the approach taken by Ambient for providing distribute AI compute incentives. Large-language models (LLMs) are fast becoming basic infrastructure. Ambient positions itself as the “AI-secured blockchain” that will underwrite that infrastructure, doing for autonomous agents […]

Interview on Round Table Group’s podcast

The expert witness search and referral firm Round Table Group was kind enough to interview me on their podcast. If you want to listen on your mobile device, it’s on their Engaging Experts channel.

Transcranial ultrasound clinical results for mental illness and dementia

  Recently, transcranial ultrasound has been getting some press. This has been a deep interest for a long time so I thought I would write up where the clinical results are at present. I haven’t covered the important work which combines transcranial ultrasound with, for example, cancer drugs. This is only about mental illness and […]

An update on MEMS technology

  Introduction Micro-Electro-Mechanical Systems (MEMS) have long played an understated yet indispensable role in modern technology. Born from the microfabrication revolution that accompanied semiconductor advances, these tiny devices integrate mechanical elements with electronic circuitry – a synergy that has resulted in applications across industries such as automotive safety, consumer electronics, medical devices, and biometric security. […]

Biometrics on Trial: How Emerging Technologies Are Shaping Security—and the Courtroom

Introduction Biometric security, once a topic limited to science fiction or niche industrial applications, has rapidly become an essential part of modern technology. Fingerprint scans unlock our smartphones, facial-recognition systems monitor sensitive facilities, and palm-print authentication grants access to restricted areas. Yet as these systems expand in scope, courts are increasingly tasked with addressing the […]

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2443 Fillmore St. #380-4039
San Francisco, CA 94115 USA
(833) 860-3966 (toll-free)

Expert Witnessing

expert@riversonicsolutions.com

Technical Consulting

info@riversonicsolutions.com

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