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Sundsvall, Sweden

Sunds Defibrator Ab

USPTO Granted Patents = 19

Forward Citations = 150

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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),

Sunds Defibrator Ab is a leading manufacturer of equipment for the pulp and paper industry. With over 100 years of experience, Sunds Defibrator offers innovative solutions for defibration processes, including refining, chip washing, and screening technologies. The company is known for its high-quality products and commitment to sustainability.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

19 Patents

#3 in Sundsvall

#321 in Sweden

#31,681 in the World

Sundsvall, Sweden

Sunds Defibrator Ab

Forward Citations = 150

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)

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