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Hanover, Germany

Preussag Aktiengesellschaft

USPTO Granted Patents = 21

Trademarks = 2

Forward Citations = 271

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30 inventors (with patents filed for the assignee):

Helmut Winnacker (5 out of 14 patents)

Hans Amann (3 out of 3 patents)

Konrad Gries (2 out of 2 patents)

4. Wilhelm H Kuhlmann-Schafer (2 out of 2 patents)

5. Klaus Luck (2 out of 2 patents)

6. Jurgen Burkhardt (2 out of 2 patents)

7. Jorgen Christensen (1 out of 4 patents)

8. Niels D Jensen (1 out of 52 patents)

9. Trevellyn M Coltman (1 out of 1 patent)

10. Alfred E Fletcher (1 out of 1 patent)

11. Bernhard Prevedel (1 out of 1 patent)

12. Rudiger Bockle (1 out of 1 patent)

13. Horst Greve (1 out of 1 patent)

14. Hans-Joachim Jordan (1 out of 1 patent)

15. Wilfried Tuennermann (1 out of 1 patent)

21 patents: Sort by Forward Citations

1. 5246070 - Piping for the completion of a groundwater monitoring site (1993-09-21),

2. 5224389 - Method and apparatus for taking samples from a groundwater monitoring (1993-07-06),

3. 5182731 - Well bore data transmission apparatus (1993-01-26),

4. 5154538 - Method and apparatus for removing a liquid phase floating on a surface (1992-10-13),

5. 4947944 - Device for steering a drilling tool and/or drill string (1990-08-14),

6. 4688831 - Threaded or push-type coupling (1987-08-25),

7. 4652055 - Device for collecting manganese nodules on the ocean floor (1987-03-24),

8. 4580049 - Probe for locating mineral deposits (1986-04-01),

9. 4442908 - Tool for drilling curved sections of well holes (1984-04-17),

10. 4398361 - Recovery of sediments from the bottom of the sea by suspended suction (1983-08-16),

11. 4386473 - Recovery of sediments from the bottom of the sea (1983-06-07),

12. 4316386 - Fluid pressure measuring apparatus for incorporation into a pipeline (1982-02-23),

13. 4293265 - Hydraulically operated hoisting apparatus for a ship for picking (1981-10-06),

14. 4160623 - Deep well pump (1979-07-10),

15. 4158963 - Process for determining the location and/or extent of rock cavities (1979-06-26),

Preussag Aktiengesellschaft is a German multinational corporation focusing on various industries such as tourism, energy, and logistics. Established in 1923, the company has grown to become a key player in the global market with a strong presence in Europe and beyond. Preussag is committed to innovation, sustainability, and customer satisfaction.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

21 Patents

#9 in Hanover

#2,154 in Germany

#29,047 in the World

Hanover, Germany

Preussag Aktiengesellschaft

Forward Citations = 271

30 inventors:

Helmut Winnacker (5 out of 14 patents)

Hans Amann (3 out of 3 patents)

Konrad Gries (2 out of 2 patents)

4. Wilhelm H Kuhlmann-Schafer (2 out of 2 patents)

5. Klaus Luck (2 out of 2 patents)

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