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For the Inventor, By the Inventor

Waltham, MA, United States of America

A123 Systems LLC

Calculating rank
USPTO Granted Patents = 150

% Expired Patents = 12.7



Trademarks = 7

Forward Citations = 1,222

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202 inventors (with patents filed for the assignee):

goldMedal Yet-Ming Chiang (27 out of 137 patents)

silverMedal Antoni S Gozdz (24 out of 49 patents)

bronzeMedal Gilbert N Riley, Jr (19 out of 74 patents)

4.  Derek C Johnson (15 out of 24 patents)

5.  Chuanjing Xu (13 out of 15 patents)

6.  Andrew C Chu (13 out of 15 patents)

7.  Richard K Holman (11 out of 34 patents)

8.  Brian Moorhead (10 out of 22 patents)

9.  Jonathan Hostler (10 out of 10 patents)

10.  Paul W Firehammer (10 out of 21 patents)

11.  Maha Hammoud (9 out of 9 patents)

12.  Konstantin Tikhonov (9 out of 17 patents)

13.  Andrew L Loxley (9 out of 54 patents)

14.  Brian D Rutkowski (9 out of 46 patents)

15.  William H Gardner (8 out of 13 patents)


Core Competencies:
Lithium-Ion Batteries
Cathode Materials
Electrolyte Formulations
High Power Electrodes
Battery Management Systems
Prismatic Battery Packs
Overcharge Protection
Surface Modification

150 patents:

1. 12738536 - Composite solid-state battery cell (2026-09-15),
2. 12671147 - Battery tab configuration (2026-06-30),
3. D1131359 - Casing (2026-06-23),
4. 12665182 - Methods and systems for a lithium-ion battery cell cathode (2026-06-23),
5. D1128688 - Display screen or portion thereof with graphical user interface (2026-06-02),
6. 12626926 - Electrode with flame retardant additives and method and systems for preparation and use (2026-05-12),
7. 12620634 - Predictive thermal models for current and power capability estimation (2026-05-05),
8. 12555796 - Passivated lithium nitride as cathode pre-lithiation reagent (2026-02-17),
9. 12512515 - Electrolyte compositions for lithium ion batteries (2025-12-30),
10. 12476239 - Method and systems for metal doping on battery cathode materials (2025-11-18),
11. 12418019 - Cathode with pre-lithiation coating and methods for preparation and use (2025-09-16),
12. 12412920 - Nanoscale pore structure cathode for high power applications and material synthesis methods (2025-09-09),
13. 12362354 - Method and systems for coated cathode materials and use of coated cathode materials (2025-07-15),
14. 12272823 - Polymer binder additives for electrodes (2025-04-08),
15. 12266924 - Protection circuit for battery management system (2025-04-01),
Company Overview
A123 Systems LLC, based in Waltham, MA, specializes in advanced lithium-ion battery technologies. The company focuses on the development and manufacturing of high-performance battery solutions, including cathode materials, electrolyte formulations, and battery management systems. A123's innovations extend to high power electrodes and prismatic battery packs, emphasizing safety features such as overcharge protection and surface modification techniques. Their expertise supports a range of applications, particularly in the automotive and energy sectors.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

A123 Systems LLC USPTO Patent Assignee Logo
150 Patents

#12 in Waltham, MA

#140 in Massachusetts

#2,633 in US

#5,452 in the World

Waltham, MA (US)
Waltham, MA, United States of America

A123 Systems LLC

Forward Citations = 1,222

202 inventors:

goldMedal Yet-Ming Chiang (27 out of 137 patents)

silverMedal Antoni S Gozdz (24 out of 49 patents)

bronzeMedal Gilbert N Riley, Jr (19 out of 74 patents)

4.  Derek C Johnson (15 out of 24 patents)

5.  Chuanjing Xu (13 out of 15 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: A123 Systems LLC. Retrieved from https://idiyas.com/company/a123-systems

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

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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