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Helsinki, Finland

Oy Wartsila Ab

USPTO Granted Patents = 124

Trademarks = 6

Forward Citations = 1,272

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144 inventors (with patents filed for the assignee):

Sven Oldfelt (9 out of 10 patents)

Pauli Koutonen (6 out of 19 patents)

Kaarlo Martikainen (5 out of 7 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

Vacuum Sewage System

Door Lock

Paper Web Coating

Ship Construction

Winder Device

Floating Drilling Platform

Marine Structure

Waste Tank

Web Winding Method

Rinse Water Valve

Propeller Shaft Bearing

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

10. 4902053 - Door lock (1990-02-20),

11. 4889071 - Upstreams inclined doctor blade (1989-12-26),

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

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

14. 4838190 - Passenger ship (1989-06-13),

15. 4827820 - Paper web cut-off device (1989-05-09),

Oy Wartsila Ab is a global leader in advanced technologies and complete lifecycle solutions for the marine and energy markets. They provide sustainable solutions, equipment, and services for ships, offshore installations, and power plants. With over 180 years of experience, Wartsila aims to create a sustainable future through innovation and collaboration.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

124 Patents

#14 in Helsinki

#37 in Finland

#6,267 in the World

Helsinki, Finland

Oy Wartsila Ab

Forward Citations = 1,272

144 inventors:

Sven Oldfelt (9 out of 10 patents)

Pauli Koutonen (6 out of 19 patents)

Kaarlo Martikainen (5 out of 7 patents)

4. Hannu Oinonen (5 out of 5 patents)

5. Kauko Tomma (4 out of 8 patents)

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