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For the Inventor, By the Inventor

Tampere, Finland

Tamfelt Oyj Abp

USPTO Granted Patents = 20

% Expired Patents = 40.0

Forward Citations = 124

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24 inventors (with patents filed for the assignee):

goldMedal Seppo Taipale (5 out of 11 patents)

silverMedal Terttu Turpeinen (4 out of 5 patents)

bronzeMedal Tauno Virtanen (3 out of 4 patents)

4.  Pekka Kortelainen (3 out of 5 patents)

5.  Tania Rautio (3 out of 4 patents)

6.  Kari Hyvönen (3 out of 3 patents)

7.  Satu Hagfors (2 out of 5 patents)

8.  Heikki Rehakka (2 out of 3 patents)

9.  Kari Hyvönen (2 out of 2 patents)

10.  Aulis Perälä (2 out of 2 patents)

11.  Vesa-Matti Riihioja (1 out of 8 patents)

12.  Rauno Enqvist (1 out of 8 patents)

13.  Matti Servo (1 out of 4 patents)

14.  Olli Jermo (1 out of 2 patents)

15.  Eino Sorri (1 out of 2 patents)


20 patents:

1. 7507679 - Paper machine fabric (2009-03-24),
2. 7381307 - Method of manufacturing a press felt, and a press felt, with the shape of a closed loop (2008-06-03),
3. 7370766 - Filter cloth and replaceable filter module (2008-05-13),
4. 7306704 - Press felt (2007-12-11),
5. 7001489 - Paper machine fabric (2006-02-21),
6. 6797121 - Press felt structure and method of manufacturing press felt (2004-09-28),
7. 6787492 - Filter cloth (2004-09-07),
8. 6773553 - Method of making press felt, and press felt (2004-08-10),
9. 6770172 - Method of making press felt, and press felt (2004-08-03),
10. 6742548 - Dryer screen (2004-06-01),
11. 6719148 - Filter cloth and replaceable filter module (2004-04-13),
12. 6658709 - Method for manufacturing shrink fabric, and shrink fabric (2003-12-09),
13. 6605188 - Transfer belt for a paper machine (2003-08-12),
14. 6533901 - Paper machine fabric (2003-03-18),
15. D466601 - Fastening strip for fastening a filter cloth against a filter surface (2002-12-04),
Company Overview
Tamfelt Oyj Abp is a Finnish company specializing in the development and manufacturing of advanced industrial textiles and filtration solutions. With a strong focus on innovation, the company serves various sectors, including pulp and paper, food processing, and environmental applications. Tamfelt is recognized for its expertise in creating high-performance products that enhance operational efficiency and sustainability. The company operates primarily in Europe, leveraging its technological capabilities to meet the evolving needs of its diverse clientele.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

20 Patents

#11 in Tampere

#169 in Finland

#31,295 in the World

Tampere, FI
Tampere, Finland

Tamfelt Oyj Abp

Forward Citations = 124

24 inventors:

goldMedal Seppo Taipale (5 out of 11 patents)

silverMedal Terttu Turpeinen (4 out of 5 patents)

bronzeMedal Tauno Virtanen (3 out of 4 patents)

4.  Pekka Kortelainen (3 out of 5 patents)

5.  Tania Rautio (3 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tamfelt Oyj Abp. Retrieved from https://idiyas.com/company/tamfelt-oyj-abp

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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