Forward Citations = 131

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12 inventors (with patents filed for the assignee):

Peter Hubert (4 out of 10 patents)

Johann Kohler (2 out of 2 patents)

Rudolf Rothe (2 out of 2 patents)

4. Otto Vitzthum (2 out of 8 patents)

5. Ludwig Roselius (2 out of 2 patents)

6. Hans-Albert Kurzhals (2 out of 4 patents)

7. Peter Werkhoff (2 out of 3 patents)

8. Klaus F Sylla (1 out of 5 patents)

9. Herbert Grebe (1 out of 1 patent)

10. Karl-Friedrich Schroder (1 out of 1 patent)

11. Wolfgang Hartwig (1 out of 1 patent)

12. Manfred Barthels (1 out of 2 patents)

7 patents: Sort by Forward Citations

1. 4411923 - Process for the extraction of caffeine from super-critical solutions (1983-10-25),

2. 4308291 - Process for decaffeinating green coffee (1981-12-29),

3. 4255458 - Method for the selective extraction of caffeine from vegetable materials (1981-03-10),

4. 4168324 - Process of extracting stimulants from coffee (1979-09-18),

5. 4134535 - Pressure relief valve for packing containers (1979-01-16),

6. 4060394 - Bottom closure for a chemical reactor (1977-11-29),

7. 4049409 - Method for transferring a highly compressed gas from a reactor to a (1977-09-20),

Company Overview

Hag Aktiengesellschaft is a leading manufacturer of innovative train models and accessories. With over 75 years of experience in the industry, the company is known for its high-quality products and extensive range of model trains in various scales. hag AG is dedicated to providing customers with top-notch service and continually strives to push the boundaries of model train technology.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

7 Patents

#26 in Bremen

#4,865 in Germany

Bremen, Germany

Hag Aktiengesellschaft

Forward Citations = 131

12 inventors:

Peter Hubert (4 out of 10 patents)

Johann Kohler (2 out of 2 patents)

Rudolf Rothe (2 out of 2 patents)

4. Otto Vitzthum (2 out of 8 patents)

5. Ludwig Roselius (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hag Aktiengesellschaft. Retrieved from https://idiyas.com/company/hag-ag

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]