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Sundsvall, Sweden

Sunds Defibrator Ab

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USPTO Granted Patents = 19

Forward Citations = 153

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16 inventors (with patents filed for the assignee):

Hjalmar S Bystedt (5 out of 5 patents)

Rolf B Reinhall (4 out of 24 patents)

Ebbe Hoden (2 out of 5 patents)

4. Erich Guggenberger (2 out of 2 patents)

5. Lars-Otto Sislegard (1 out of 2 patents)

6. Sven-Ingvar Thorbjornsson (1 out of 6 patents)

7. Karl N Cederquist (1 out of 3 patents)

8. Sven G Akerlund (1 out of 1 patent)

9. Jan-Erik Hook (1 out of 2 patents)

10. Bengt O Akerblom (1 out of 1 patent)

11. Johan I Johansson (1 out of 1 patent)

12. Franco Nardi (1 out of 1 patent)

13. Nils G Virving (1 out of 1 patent)

14. Steve Moldenius (1 out of 1 patent)

15. Rolf T Larsson (1 out of 1 patent)

19 patents: Sort by Forward Citations

1. 5067660 - Stress regulator for pulp grinding apparatus and method (1991-11-26),

2. 5042726 - Apparatus and method for conjoint adjustment of both the inner and outer (1991-08-27),

3. 4955217 - Wire coiling arrangement (1990-09-11),

4. 4890796 - Combined hydrostatic/hydrodynamic bearing system for grinding apparatus (1990-01-02),

5. 4831713 - Arrangement for removing wrapping wire from bales (1989-05-23),

6. 4772358 - Method for making pulp (1988-09-20),

7. 4734160 - Method of two-stage peroxide bleaching of mechanical or semi-mechanical (1988-03-29),

8. 4718843 - Hot press for treating a web of material (1988-01-12),

9. 4718611 - Device for production of mechanical pulp (1988-01-12),

10. 4688301 - Method and apparatus for forming a web (1987-08-25),

11. 4614304 - Rotor/mixer for controlling mixing and refining of pulp material (1986-09-30),

12. 4612088 - Reactor to perform chemical reactions with a disintegrating disc (1986-09-16),

13. 4604957 - Method for wet combustion of organic material (1986-08-12),

14. 4456503 - Apparatus for manfacturing mechanical pulp (1984-06-26),

15. 4445973 - Method and device for the manufacture of mechanical pulp (1984-05-01),

Company Overview

Sunds Defibrator Ab, based in Sundsvall, Sweden, specializes in the development and manufacturing of advanced equipment for the pulp and paper industry. The company is renowned for its innovative solutions in fiber processing, focusing on enhancing the efficiency and sustainability of production processes. With a strong emphasis on research and technology, Sunds Defibrator Ab contributes to the advancement of mechanical and chemical pulping techniques, supporting the global shift towards more eco-friendly practices in the industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

19 Patents

#3 in Sundsvall

#345 in Sweden

#32,705 in the World

Sundsvall, Sweden

Sunds Defibrator Ab

Forward Citations = 153

16 inventors:

Hjalmar S Bystedt (5 out of 5 patents)

Rolf B Reinhall (4 out of 24 patents)

Ebbe Hoden (2 out of 5 patents)

4. Erich Guggenberger (2 out of 2 patents)

5. Lars-Otto Sislegard (1 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sunds Defibrator Ab. Retrieved from https://idiyas.com/company/sunds-defibrator-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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