For the Inventor, By the Inventor

Enter assignee name

Hanover, Germany

Preussag Aktiengesellschaft

USPTO Granted Patents = 21

Trademarks = 2

Forward Citations = 275

Loading Chart...

Loading Chart...

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, headquartered in Hanover, Germany, is a diversified company with interests spanning various sectors including tourism, logistics, and manufacturing. The organization is known for its innovative approaches in developing solutions that enhance operational efficiency and customer experience. With a strong focus on sustainability and technological advancement, Preussag engages in projects that leverage modern technologies to meet evolving market demands, contributing significantly to the regional economy and beyond.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

21 Patents

#40 in Hanover

#2,130 in Germany

#29,928 in the World

Hanover, Germany

Preussag Aktiengesellschaft

Forward Citations = 275

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)

Please report any incorrect information to [email protected]

Loading…