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Dortmund, Germany

O&k Orenstein & Koppel Aktiengesellschaft

USPTO Granted Patents = 110

Forward Citations = 858

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119 inventors (with patents filed for the assignee):

Dieter Schwappach (7 out of 7 patents)

Gustav Leidinger (6 out of 9 patents)

Peter Hofling (5 out of 5 patents)

4. Walter Kolb (4 out of 5 patents)

5. Bernd Kirchhoff (4 out of 4 patents)

6. Reinhard Trumper (4 out of 5 patents)

7. Hermann Mecklenfeld (3 out of 4 patents)

8. Hans-Dietmar Maury (3 out of 7 patents)

9. Wolfgang Buslowski (3 out of 3 patents)

10. Helmut Bentz (3 out of 4 patents)

11. Ulrich Binder (3 out of 3 patents)

12. Klaus Schoneweiss (3 out of 4 patents)

13. Helmut Heusler (3 out of 4 patents)

14. Uwe Rathje (3 out of 3 patents)

15. Dieter Hoffmann (3 out of 3 patents)

Core Competencies:

Hydraulic Systems

Mobile Construction Machines

Earth-Moving Equipment

Planetary Gear Mechanisms

Vibrating Screen Crushers

Hydrostatic Transmissions

Escalator Technology

Material Processing

Load Transport Solutions

Brake Systems

Mining Equipment

Construction Machinery

110 patents: Sort by Forward Citations

1. 7032471 - Control device for controlling machines by hand or foot (2006-04-25),

2. 6959497 - Device for recording the angle of rotation between two components (2005-11-01),

3. 6701823 - Method and device for controlling a lift cylinder, especially of working machines (2004-03-09),

4. 6685277 - Method for braking a revolvable superstructure of a working machine and a pivoted brake unit (2004-02-03),

5. 6401856 - Method and device for the power shiftable change-over of a hydrostatic vehicle drive of a mobile construction machine (2002-06-11),

6. 6309171 - Mobile loading machine with front-end loading equipment (2001-10-30),

7. 6290048 - Wheel hub with integral planetary gear mechanism and multidisk brake (2001-09-18),

8. 6131687 - Process for actuating the steering cylinders of mobile plant and (2000-10-17),

9. 5784812 - Method of controlling the positioning of an outfit tilting cylinder (1998-07-28),

10. 5709085 - Method of cooling the hydraulic fluid in the working circuit of a (1998-01-20),

11. 5568841 - Rear frame for center pivot steered construction machinery (1996-10-29),

12. 5533284 - Earth-moving machine with revolving tower and adjustable counterweight (1996-07-09),

13. 5522259 - Process and arrangement for measuring multiple disk brake wear (1996-06-04),

14. 5513491 - Hydraulic vibration damping system for machines provided with tools (1996-05-07),

15. 5465823 - Handrail inlet element of an escalator, a moving walkway or the like (1995-11-14),

O&K Orenstein & Koppel Aktiengesellschaft is a German engineering company that specializes in manufacturing construction machinery and industrial equipment. With over 100 years of experience, O&K has established itself as a trusted provider of high-quality products and innovative solutions in the global market. Their portfolio includes excavators, loaders, cranes, and various other heavy machines used in construction, mining, and logistics industries. Committed to constant improvement and customer satisfaction, O&K continues to drive innovation and deliver reliable equipment to meet the evolving needs of their clients.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

110 Patents

#3 in Dortmund

#569 in Germany

#6,948 in the World

Dortmund, Germany

O&k Orenstein & Koppel Aktiengesellschaft

Forward Citations = 858

119 inventors:

Dieter Schwappach (7 out of 7 patents)

Gustav Leidinger (6 out of 9 patents)

Peter Hofling (5 out of 5 patents)

4. Walter Kolb (4 out of 5 patents)

5. Bernd Kirchhoff (4 out of 4 patents)

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