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Nuremberg, Germany

Ludwig Heumann & Co. Gmbh

USPTO Granted Patents = 23

Forward Citations = 62

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24 inventors (with patents filed for the assignee):

Helmut Schickaneder (16 out of 34 patents)

Kurt H Ahrens (15 out of 26 patents)

Istvan Szelenyi (12 out of 33 patents)

4. Peter Morsdorf (8 out of 18 patents)

5. Stefan Postius (7 out of 7 patents)

6. Rolf Herter (6 out of 12 patents)

7. Heidrun Engler (5 out of 14 patents)

8. Walter Otto Liebenow (5 out of 5 patents)

9. Jaroslav Prikryl (3 out of 3 patents)

10. Kay Brune (2 out of 18 patents)

11. Walter Schunack (2 out of 17 patents)

12. Istvan Szeleny (2 out of 2 patents)

13. Edgar Fritschi (2 out of 2 patents)

14. Herbert Hansen (2 out of 2 patents)

15. Kurt Wegner (2 out of 2 patents)

23 patents: Sort by Forward Citations

1. 5025016 - Pyrimidine-thioalkyl pyridine derivatives, medicaments containing these (1991-06-18),

2. 4866066 - Thiomethylpyridine derivatives and their use for eliciting a (1989-09-12),

3. 4810715 - Imidazoyl-substituted thiomethylpyridine derivatives, method of (1989-03-07),

4. 4738960 - 1,3,4-Thiadiazole derivatives and pharmaceutical preparations useful as (1988-04-19),

5. 4732986 - Benzothiazole derivatives, processes for their preparation and (1988-03-22),

6. 4727081 - 3,4-Diazole derivatives and pharmaceutical preparations containing these (1988-02-23),

7. 4697035 - Process for the preparation of basically substituted phenylacetonitriles (1987-09-29),

8. 4671914 - Production of granulates by using a tabletting machine (1987-06-09),

9. 4666921 - Pyrazole derivatives, processes for their preparation and pharmaceutical (1987-05-19),

10. 4659721 - Alkanol derivatives, and pharmaceutical preparation containing these (1987-04-21),

11. 4656180 - Diamine derivatives and pharmaceutical preparations containing these (1987-04-07),

12. 4647684 - Process for the production of (1987-03-03),

13. 4634700 - 1,3-dioxolanyl derivatives, a process for their preparation, their use (1987-01-06),

14. 4600721 - Pharmaceutical preparation (1986-07-15),

15. 4599346 - Propan-2-ol derivatives, a process for their production and medicaments (1986-07-08),

Ludwig Heumann & Co. GmbH is a leading manufacturer and distributor of high-quality office supplies, school supplies, and stationery products. With over 100 years of experience, the company offers a wide range of products including paper, writing instruments, filing solutions, and much more. Heumann is known for its commitment to quality, innovation, and customer satisfaction.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

23 Patents

#14 in Nuremberg

#1,998 in Germany

#26,790 in the World

Nuremberg, Germany

Ludwig Heumann & Co. Gmbh

Forward Citations = 62

24 inventors:

Helmut Schickaneder (16 out of 34 patents)

Kurt H Ahrens (15 out of 26 patents)

Istvan Szelenyi (12 out of 33 patents)

4. Peter Morsdorf (8 out of 18 patents)

5. Stefan Postius (7 out of 7 patents)

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