4D-S, Ltd.

Calculating rank

USPTO Granted Patents = 9

% Expired Patents = 11.1

Forward Citations = 25

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9 inventors (with patents filed for the assignee):

Seshubabu Desu (5 out of 15 patents)

Makoto Nagashima (2 out of 2 patents)

Dongmin Chen (2 out of 49 patents)

4. Michael Allen Van Buskirk (2 out of 77 patents)

5. Lee Edward Cleveland (2 out of 74 patents)

6. Franz Michael Schuette (1 out of 50 patents)

7. Zhida Lan (1 out of 21 patents)

8. Kurt Pfluger (1 out of 1 patent)

9. Jean Yang-Scharlotta (1 out of 1 patent)

9 patents: Sort by Forward Citations

1. 10833262 - Resistive memory device having a conductive barrier layer (2020-11-10),

2. 10734576 - Resistive memory device having ohmic contacts (2020-08-04),

3. 10381558 - Resistive memory device having a retention layer (2019-08-13),

4. 10319907 - Resistive memory device having a template layer (2019-06-11),

5. 9711714 - Systems and methods for fabricating self-aligned resistive/magnetic memory cell (2017-07-18),

6. 9634247 - Complementary metal oxide heterojunction memory devices and methods related thereto (2017-04-25),

7. 9058876 - Methods and circuits for bulk erase of resistive memory (2015-06-16),

8. 8709891 - Method and system for utilizing Perovskite material for charge storage and as a dielectric (2014-04-29),

9. 8466032 - Systems and methods for fabricating self-aligned memory cell (2013-06-18),

Company Overview

4d-s, Ltd. is a cutting-edge technology company specializing in developing innovative solutions for the defense and security industries. With a team of experienced engineers and designers, 4d-s, Ltd. is at the forefront of creating advanced systems for surveillance, communication, and cyber security. Our mission is to provide our clients with state-of-the-art products and services that enhance their capabilities and protect their interests.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

9 Patents

#5 in Perth

#433 in Australia

Perth, Australia

4D-S, Ltd.

Forward Citations = 25

9 inventors:

Seshubabu Desu (5 out of 15 patents)

Makoto Nagashima (2 out of 2 patents)

Dongmin Chen (2 out of 49 patents)

4. Michael Allen Van Buskirk (2 out of 77 patents)

5. Lee Edward Cleveland (2 out of 74 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: 4D-S, Ltd.. Retrieved from https://idiyas.com/company/4d-s

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]