Long Beach, CA, United States of America

Chang-Dong Feng

This inventor holds 27 USPTO granted patents and 5 published patent applications, plus 6 CIPO patents and 10 EPO patents, primarily in Biochemical Sensors. Top assignees: Rosemount Analytical Inc., Rosemount Inc., Broadley-James Corporation. Active years: 2001-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Chang-Dong Feng. Retrieved from https://idiyas.com/inventor/chang-dong-feng

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 27 (Patent Applications = 5)

% Patents Active = 81.5

CIPO Patents = 6 (Patent Applications = 2)

EPO Patents = 10 (Patent Applications = 16)

Average Co-Inventor Count = 1.9

ph-index = 7

Forward Citations = 106(Granted Patents)

Company Filing History:

15 out of 78

Rosemount Analytical Inc.

Broadley-James Corporation

patents

4. 1 out of 69

Teledyne Technologies Incorporated

patents

Years Active: 2001-2025

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Areas of Expertise:

Gas-Permeable Membrane

Bioreactor Sensor

Colorimetric Analyzer

pH Sensor

Dissolved Oxygen Sensor

Conductivity Sensor

Amperometric Sensor

Wet Chemistry Analyzer

Reagent Diagnostics

Light Source

Calibration Chamber

Flow-Through Sensor

27 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12391908 - Reinforced gas-permeable membrane and reinforced gas-permeable well utilizing same (2025-08-19),

2. 12313586 - Sensing element for use with media-preserving storage and calibration chamber (2025-05-27),

3. 12259354 - Sensor with rotatable sensor element and pressure equalization mechanism (2025-03-25),

4. 12055511 - Sensing element for use with media-preserving storage and calibration chamber (2024-08-06),

5. 11613724 - Single-use bioreactor sensor interface (2023-03-28),

6. 11384325 - Single-use bioreactor port with multiple sensors (2022-07-12),

7. 11125696 - Colorimetric analyzer with de-bubbling (2021-09-21),

8. 10788416 - Multiple wavelength light source for colorimetric measurement (2020-09-29),

9. 10677717 - Colorimetric analyzer with reagent diagnostics (2020-06-09),

10. 10119951 - On-line wet chemistry analyzer (2018-11-06),

11. 9945830 - Standard solution with cleaning reagent for wet chemistry analyzer (2018-04-17),

12. 9891162 - Photometric measurement cell (2018-02-13),

13. 9868930 - pH sensor for single use equipment (2018-01-16),

14. 9029130 - Unitary plastic conductivity sensor (2015-05-12),

15. 8900855 - pH sensor integration to single use bioreactor/mixer (2014-12-02),

Title: Innovator Spotlight: Chang-Dong Feng

Introduction

Chang-Dong Feng, based in Long Beach, California, is a prolific inventor with a remarkable portfolio comprising 25 patents. His inventions reflect a strong commitment to advancing technologies, particularly in the realm of sensors and media-preserving storage systems.

Latest Patents

Among his latest innovations is the "Sensing Element for Use with Media-Preserving Storage and Calibration Chamber." This invention describes a sensor that features a sensing element housed within a storage compartment filled with a storage medium, which also functions as a calibration medium. The design includes a sensing surface strategically located away from the distal end of the sensing element, optimizing its interaction with a sealing member, such as an O-ring. This structure supports the retention of media for post-measurement validation while allowing the sensor's operation to be efficiently controlled. Additionally, the sensing element can be repositioned between two states, enabling it to interact with a process medium while protecting the integrity of the storage medium. An actuator mechanism, which can be controlled by an external system, facilitates this movement.

Career Highlights

Chang-Dong has made significant contributions during his tenure at Rosemount Analytical and Rosemount Inc., companies renowned for their innovations in analytical instrumentation and technology solutions. His role as an inventor has allowed him to impact various technological advancements and strengthen the product lines of these esteemed organizations.

Collaborations

Throughout his career, Chang-Dong has collaborated with notable professionals in his field, including Bradley A. Butcher and Barry W. Benton. These collaborations have undoubtedly enriched his inventive projects and expanded the scope of their technological contributions.

Conclusion

Chang-Dong Feng embodies the spirit of innovation through his extensive patent portfolio and impactful inventions. As he continues to develop groundbreaking technologies, his work not only enhances the capabilities of media-preserving storage solutions but also contributes significantly to the landscape of sensor technology. His journey serves as an inspiring example for inventors and innovators in the tech industry.

Profile summary based on public USPTO records.