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Frankfurt, Germany

Philipp Holzmann Aktiengesellschaft

USPTO Granted Patents = 17

Forward Citations = 133

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23 inventors (with patents filed for the assignee):

Wilfried Krabbe (5 out of 6 patents)

Hans Schafer (4 out of 4 patents)

Joachim Fischer (2 out of 3 patents)

4. Heinz Wind (2 out of 2 patents)

5. Wolfram Illgner (2 out of 2 patents)

6. Wolfgang Zerna (2 out of 2 patents)

7. Dietmar Kallinich (1 out of 3 patents)

8. Hansgeorg Balthaus (1 out of 1 patent)

9. Karl Hoffmann (1 out of 1 patent)

10. Andreas Monning (1 out of 1 patent)

11. Friedrich Lehmann (1 out of 1 patent)

12. Wolfgand Kahlert (1 out of 1 patent)

13. Ludwig Muhe (1 out of 1 patent)

14. Andreas Krieg (1 out of 1 patent)

15. Siegfried Brandl (1 out of 1 patent)

17 patents: Sort by Forward Citations

1. 5186217 - Fluid-impervious structure and method of making same (1993-02-16),

2. 5174394 - Apparatus for cleaning layers of earth (1992-12-29),

3. 5127771 - Narrow or slotted wall which is introduced into a substratum and sealing (1992-07-07),

4. 5061119 - Method and apparatus for the remediation of contaminated soils (1991-10-29),

5. 5018639 - Storage container for low-temperature liquids (1991-05-28),

6. 4662134 - Cryogenic wedge-type anchor for stranded tension cables (1987-05-05),

7. 4630798 - Method and device for erecting building structures such as bridges, (1986-12-23),

8. 4499699 - Molding device for sub-soil curtain wall sections (1985-02-19),

9. 4492087 - Container for storing refrigerated liquids (1985-01-08),

10. 4434591 - Component useful in producing a cooling tower (1984-03-06),

11. 4355453 - Method of protecting the surfaces of concrete structures (1982-10-26),

12. 4332508 - Shield for tunneling and mining (1982-06-01),

13. 4298230 - Tunnelling apparatus (1981-11-03),

14. 4255366 - Process of producing a cooling tower (1981-03-10),

15. 4253781 - Method and an apparatus for providing a grouted anchorage against (1981-03-03),

Company Overview

Philipp Holzmann Aktiengesellschaft is a prominent construction and engineering firm based in Frankfurt, Germany. The company specializes in a wide range of construction services, including civil engineering, infrastructure development, and project management. With a strong focus on innovative building techniques and sustainable practices, it plays a significant role in shaping urban landscapes and enhancing infrastructure across various regions. The firm is committed to delivering high-quality projects that meet the evolving needs of society.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

17 Patents

#49 in Frankfurt

#2,497 in Germany

#35,948 in the World

Frankfurt, Germany

Philipp Holzmann Aktiengesellschaft

Forward Citations = 133

23 inventors:

Wilfried Krabbe (5 out of 6 patents)

Hans Schafer (4 out of 4 patents)

Joachim Fischer (2 out of 3 patents)

4. Heinz Wind (2 out of 2 patents)

5. Wolfram Illgner (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Philipp Holzmann Aktiengesellschaft. Retrieved from https://idiyas.com/company/philipp-holzmann-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]

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