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Helsinki, Finland

Oy Wartsila Ab

USPTO Granted Patents = 124

Trademarks = 4

Forward Citations = 1,287

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143 inventors (with patents filed for the assignee):

Sven Oldfelt (9 out of 10 patents)

Kaarlo Martikainen (6 out of 8 patents)

Pauli Koutonen (6 out of 19 patents)

4. Hannu Oinonen (5 out of 5 patents)

5. Kauko Tomma (4 out of 8 patents)

6. Gary L Stahl (4 out of 4 patents)

7. Eero Makinen (4 out of 4 patents)

8. Torsten Heideman (4 out of 4 patents)

9. Oiva Hurskainen (3 out of 8 patents)

10. Harri Kuosa (3 out of 13 patents)

11. Jukka Joutsjoki (3 out of 7 patents)

12. Henry Olin (3 out of 6 patents)

13. Dan Eklund (3 out of 6 patents)

14. Sivert Westergard (3 out of 5 patents)

15. Paavo Piiroinen (3 out of 3 patents)

Core Competencies:

Vacuum Toilet System

Sewage Arrangement

Paper Web Coating

Waste Tank

Ship Construction

Drilling Platform

Web Winding

Door Lock

Marine Structure

Rinse Water Valve

Roll Blade Assembly

Multipurpose Cleaning

124 patents: Sort by Forward Citations

1. 5692250 - Vacuum toilet system with treated rinse liquid (1997-12-02),

2. 5454936 - Vacuum toilet system (1995-10-03),

3. 5245711 - Vacuum toilet system (1993-09-21),

4. 5165457 - Vacuum sewer arrangement (1992-11-24),

5. 5007117 - Vacuum toilet system with simultaneous rinse and discharge (1991-04-16),

6. 5002592 - Waste tank for a vacuum sewage system (1991-03-26),

7. 4973894 - Method and arrangement for optimizing of the function of a door closer (1990-11-27),

8. 4967035 - Method for testing different substances and a combustion engine for (1990-10-30),

9. 4930474 - Distribution and control valve for a fuel injection pump (1990-06-05),

10. 4928326 - Vacuum sewer arrangement (1990-05-29),

11. 4902053 - Door lock (1990-02-20),

12. 4889071 - Upstreams inclined doctor blade (1989-12-26),

13. 4865631 - Vacuum sewage system (1989-09-12),

14. D302238 - Key or similar article (1989-07-18),

15. 4838190 - Passenger ship (1989-06-13),

Company Overview

Oy Wartsila Ab, headquartered in Helsinki, Finland, specializes in advanced vacuum toilet systems and related sewage arrangements, primarily for marine and offshore applications. The company is recognized for its innovative solutions in ship construction and drilling platforms, enhancing efficiency and sustainability in waste management. Wartsila also engages in technologies related to paper web coating, web winding, and secure door locking systems, contributing to various industrial sectors with a focus on environmental responsibility.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

124 Patents

#14 in Helsinki

#39 in Finland

#6,464 in the World

Helsinki, Finland

Oy Wartsila Ab

Forward Citations = 1,287

143 inventors:

Sven Oldfelt (9 out of 10 patents)

Kaarlo Martikainen (6 out of 8 patents)

Pauli Koutonen (6 out of 19 patents)

4. Hannu Oinonen (5 out of 5 patents)

5. Kauko Tomma (4 out of 8 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Oy Wartsila Ab. Retrieved from https://idiyas.com/company/oy-wartsila-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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