Cupertino, CA, United States of America

Philip N Ji

This inventor holds 97 USPTO granted patents and 16 published patent applications and 1 EPO patent, primarily in Distributed Fiber Optic Sensing (CPC class H04Q11-0005). Top assignees: Nec Corporation, Nec Laboratories America, Inc., Nec Corportation. Active years: 2006-2026.

USPTO Granted Patents = 97 

% Patents Active = 80.4

 

Average Co-Inventor Count = 3.4

ph-index = 8

Forward Citations = 261(Granted Patents)

Forward Citations (Not Self Cited) = 237(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Cupertino, CA (US) (2015)
  • Plainsboro, NJ (US) (2010 - 2018)
  • Princeton, NJ (US) (2006 - 2022)
  • Cranbury, CA (US) (2022)
  • Cranbury, NJ (US) (2015 - 2024)

Company Filing History:


Years Active: 2006-2026

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Areas of Expertise:
Distributed Fiber Optic Sensing
Traffic Monitoring
Anomaly Detection
Optical Communication
Machine Learning
Dynamic Range Suppression
Vibration Sensing
Temperature Sensing
Wavelength Division Multiplexing
Network Architecture
Signal Processing
Optical Networks
97 patents (USPTO):Explore Patents

Title: Innovations by Philip N. Ji in Fiber Optic Sensing Technology

Introduction

Philip N. Ji, a prominent inventor based in Cupertino, CA, has made significant contributions to the field of fiber optic sensing technology. With an impressive portfolio of 92 patents, his work has paved the way for advancements that enhance the reliability and performance of distributed sensing systems.

Latest Patents

Among his latest innovations, Ji holds patents for two notable technologies. The first, titled "Distributed Fiber Optic Sensor Placement with Shared Protection," describes systems and methods that optimize the placement of sensors in distributed fiber optic sensor (DFOS) networks. This advantageously ensures high reliability and fault-tolerant operation, even in the event of multiple fiber failures.

His second patent, "Distributed Acoustic Sensing Using Dynamic Range Suppression," outlines improved techniques for distributed acoustic sensing by applying dynamic range suppression in optical time-domain reflectometry. This patent utilizes a feedback loop, combining optical and electrical elements, to minimize amplitude dynamic range, thus enhancing the detection capabilities of the system.

Career Highlights

Philip has worked with reputable organizations, including NEC Corporation and NEC Laboratories America, Inc. His expertise in the field has driven innovation and exceptional developments in sensor technologies, benefiting numerous applications across industries.

Collaborations

Throughout his career, Ji has collaborated with notable individuals such as Ting Wang and Ankitkumar N. Patel. These partnerships reflect his commitment to advancing the field of fiber optics and enhancing collaborative research efforts.

Conclusion

Philip N. Ji's extensive portfolio and groundbreaking patents exemplify his dedication to innovation in fiber optic sensing technology. His work not only contributes to the advancement of the field but also demonstrates the importance of collaboration and continuous research in achieving significant technological progress.

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