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For the Inventor, By the Inventor

London, United Kingdom

Associated Electrical Industries Limited


USPTO Granted Patents = 25

Forward Citations = 275

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33 inventors (with patents filed for the assignee):

goldMedal John D Ainsworth (3 out of 5 patents)

silverMedal Erich Siegfried Friedlander (3 out of 3 patents)

bronzeMedal John David Markham (2 out of 2 patents)

4.  Philip A Ward (2 out of 2 patents)

5.  Brian A Irving (1 out of 2 patents)

6.  Robert J Powell (1 out of 3 patents)

7.  Sydney Evans (1 out of 1 patent)

8.  Thomas Oliver Merren (1 out of 1 patent)

9.  Edward F Croft (1 out of 1 patent)

10.  John J Lane (1 out of 1 patent)

11.  Peter G Blackman (1 out of 1 patent)

12.  Jack T Forrester (1 out of 1 patent)

13.  John Lowe (1 out of 1 patent)

14.  Colin J Peachey (1 out of 1 patent)

15.  Raymond S Ashpole (1 out of 1 patent)


Core Competencies:
Sealing Composition
Mineral Insulated Cable
Induction Motors
Power Supply
Static Reactive Compensator
Dynamic Braking
Synchronous Motors
Optical Fibre
Excitation Systems
AC/DC Converter
Traction System
Filament Coil

25 patents:

1. 5221709 - Sealing composition and a mineral insulated electric cable termination (1993-06-22),
2. 4689735 - Power supply for single-phase traction system (1987-08-25),
3. 4681988 - Switch selector mechanism (1987-07-21),
4. 4672284 - Permanent split-phase capacitor induction motor (1987-06-09),
5. 4628245 - Multipolar excitation systems (1986-12-09),
6. 4626777 - D.C. current transformer circuits (1986-12-02),
7. 4558405 - Multi-loop control system for an ac/dc converter employing mode switching (1985-12-10),
8. 4554623 - Firing-angle control in inverters (1985-11-19),
9. 4520303 - Induction motors (1985-05-28),
10. 4512827 - Method of manufacturing mineral insulated electric cable and like (1985-04-23),
11. 4503380 - Static reactive compensator (1985-03-05),
12. 4450388 - Dynamic braking of direct current motors (1984-05-22),
13. 4417911 - Manufacture of optical fibre preforms (1983-11-29),
14. 4408378 - Apparatus for forming a filament coil of figure of eight conformation (1983-10-11),
15. 4315202 - Synchronous motors (1982-02-09),
Company Overview
Associated Electrical Industries Limited is a prominent entity based in London, specializing in the development and manufacturing of electrical equipment and systems. The company focuses on innovative solutions in power generation, distribution, and control technologies, catering to various sectors including industrial, commercial, and infrastructure projects. With a commitment to advancing electrical engineering, AEI plays a crucial role in enhancing energy efficiency and reliability across its geographic markets.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

25 Patents

#148 in London

#702 in United Kingdom

#25,710 in the World

London, GB
London, United Kingdom

Associated Electrical Industries Limited

Forward Citations = 275

33 inventors:

goldMedal John D Ainsworth (3 out of 5 patents)

silverMedal Erich Siegfried Friedlander (3 out of 3 patents)

bronzeMedal John David Markham (2 out of 2 patents)

4.  Philip A Ward (2 out of 2 patents)

5.  Brian A Irving (1 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Associated Electrical Industries Limited. Retrieved from https://idiyas.com/company/associated-electrical-industries

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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