Forward Citations = 11

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7 inventors (with patents filed for the assignee):

Gustav Leidinger (1 out of 9 patents)

Walter Kolb (1 out of 5 patents)

Gunter Hilmer (1 out of 1 patent)

4. Heiko Stehmeier (1 out of 1 patent)

5. Siegfried Steinkuhler (1 out of 3 patents)

6. Franz Heine (1 out of 3 patents)

7. Manfred Kowalewski (1 out of 1 patent)

4 patents: Sort by Forward Citations

1. 5609089 - Control for dividing the ouput flow in hydraulic systems to a plurality (1997-03-11),

2. 5170576 - Cutting wheel arrangement for suction dredge (1992-12-15),

3. 5038825 - Multiport valve (1991-08-13),

4. 4601626 - Arrangement for swinging an attachment holder for the equipment of a (1986-07-22),

Company Overview

O & K Orenstein is a leading company specializing in manufacturing heavy machinery and equipment. With decades of experience in the industry, we provide reliable and innovative solutions for various industrial sectors including construction, mining, and infrastructure. Our state-of-the-art products are known for their high quality, durability, and performance. Visit our website for more information and to explore our wide range of products and services.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

4 Patents

#50 in Dortmund

#7,037 in Germany

Dortmund, Germany

O & K Orenstein

Forward Citations = 11

7 inventors:

Gustav Leidinger (1 out of 9 patents)

Walter Kolb (1 out of 5 patents)

Gunter Hilmer (1 out of 1 patent)

4. Heiko Stehmeier (1 out of 1 patent)

5. Siegfried Steinkuhler (1 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: O & K Orenstein. Retrieved from https://idiyas.com/company/o-and-k-orenstein

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]