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),

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.

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USPTO Data Jan 1 1976 - Dec 16 2025

4 Patents

#50 in Dortmund

#6,929 in Germany

Dortmund, Germany

O & K Orenstein