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Nacka Strand, Sweden

3Nine Ab

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USPTO Granted Patents = 14

% Expired Patents = 7.1

EPO Patents = 14

Trademarks = 1

Forward Citations = 90

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12 inventors (with patents filed for the assignee):

Claes Inge (11 out of 34 patents)

Torgny Lagerstedt (6 out of 34 patents)

Peter Franzen (5 out of 25 patents)

4. Christoph Erdmann (4 out of 11 patents)

5. Francesco Zitarosa (4 out of 12 patents)

6. Olev Maehans (4 out of 4 patents)

7. Martin Sandgren (4 out of 4 patents)

8. Peter Franzén (4 out of 9 patents)

9. Sebastian Brinker (2 out of 2 patents)

10. Peter Franzèn (2 out of 2 patents)

11. Yagiz Yaman (1 out of 2 patents)

12. Johan Strömberg (1 out of 1 patent)

13. Bror Morein (25 patents)

14. Göran Friman (1 patent)

15. Nils-Gunnar Ilbäck (1 patent)

14 patents: Sort by Forward Citations

1. 11167243 - Method and installation for the reduction of sulphur oxides in exhaust gas from marine diesel engines (2021-11-09),

2. 11149601 - Oil separator having first and second gas inlets and gas outlets (2021-10-19),

3. 11098623 - Oil separator, ventilation system for an internal combustion engine, and internal combustion engine comprising such an oil separator (2021-08-24),

4. 11098622 - Oil separator (2021-08-24),

5. 10682600 - Apparatus for cleaning crankcase gases (2020-06-16),

6. 10286406 - Apparatus for centrifugal separation of liquid particles from a gas (2019-05-14),

7. 10118184 - Centrifugal separator conical rotor disc elements having radial projections, and rotors having disc elements (2018-11-06),

8. 8945261 - Apparatus for centrifugal separation of solid and/or liquid particles from a flow of gas (2015-02-03),

9. 8171920 - Device for cleaning crank case gases (2012-05-08),

10. 8052779 - Device and method for cleaning a centrifugal separator (2011-11-08),

11. 8029601 - Method and apparatus for separation of particles from a flow of gas (2011-10-04),

12. 7749310 - Device and method for cleaning a centrifugal separator (2010-07-06),

13. 7731772 - Rotor unit of a centrifugal separator (2010-06-08),

14. 7396373 - Centrifugal separator for cleaning gases (2008-07-08),

Company Overview

3Nine Ab is a Swedish company based in Nacka Strand, specializing in advanced air filtration and separation technologies. The organization focuses on developing innovative solutions that enhance workplace safety and environmental sustainability, particularly in industrial settings. 3Nine's expertise lies in creating systems that effectively capture harmful particles and emissions, contributing to cleaner air and improved health standards. Their commitment to research and development ensures they remain at the forefront of air quality management solutions.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

14 Patents

#4 in Nacka Strand

#455 in Sweden

#42,312 in the World

Nacka Strand, Sweden

3Nine Ab

Forward Citations = 90

12 inventors:

Claes Inge (11 out of 34 patents)

Torgny Lagerstedt (6 out of 34 patents)

Peter Franzen (5 out of 25 patents)

4. Christoph Erdmann (4 out of 11 patents)

5. Francesco Zitarosa (4 out of 12 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: 3Nine Ab. Retrieved from https://idiyas.com/company/3nine-ab

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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