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For the Inventor, By the Inventor

Sulzbach, Germany

Hydac Filtertechnik Gmbh


USPTO Granted Patents = 126

% Expired Patents = 18.3


Trademarks = 10

Forward Citations = 538

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90 inventors (with patents filed for the assignee):

goldMedal Michael Otto Sakraschinsky (22 out of 25 patents)

silverMedal Norbert Sann (20 out of 20 patents)

bronzeMedal Volkmar Klein (12 out of 12 patents)

4.  Micha Kreibig (11 out of 14 patents)

5.  Werner Wilkendorf (11 out of 12 patents)

6.  Matthias Schwender (10 out of 10 patents)

7.  Richard Eberle (10 out of 12 patents)

8.  Stefan Hennes (10 out of 10 patents)

9.  Harald Mees (10 out of 10 patents)

10.  Edwin Koch (8 out of 8 patents)

11.  Winfried Rüb (8 out of 10 patents)

12.  Markus Dewes (7 out of 7 patents)

13.  Andreas Schmitz (5 out of 5 patents)

14.  Armin Schmidt (5 out of 5 patents)

15.  Viktor Josef Lauer (5 out of 6 patents)


Core Competencies:
Filter Device
Filter Element
Fluid Purification
Contamination Indicator
Hydraulic Valve
Suction Filtration
Coalescing Filter
Sealing Arrangement
Filter Material
Fluid Container
Fuel Filter System
Water Separator

126 patents:

1. 12661607 - Filter device (2026-06-23),
2. 12589341 - Filter device and filter element (2026-03-31),
3. 12263424 - Filter device together with filter element (2025-04-01),
4. 12257540 - Filter element (2025-03-25),
5. 12201926 - Filter device (2025-01-21),
6. 12109514 - Filter device with an element receptacle having two or more degrees of freedom relative to different axes (2024-10-08),
7. 11376949 - Closure device for a fluid container (2022-07-05),
8. 11305216 - Filter device (2022-04-19),
9. 11033838 - Filter element (2021-06-15),
10. 10926202 - Filter device with coupling element (2021-02-23),
11. 10639565 - Method for producing a filter element (2020-05-05),
12. 10617976 - Filter apparatus (2020-04-14),
13. 10610811 - Filter device with filter element (2020-04-07),
14. 10596493 - Support structure for a filter element (2020-03-24),
15. 10478760 - Filter element with a luminescent marker (2019-11-19),
Hydac Filtertechnik GmbH, based in Sulzbach, Germany, specializes in fluid filtration technologies. The company develops and manufactures a range of products including filter devices, filter elements, and hydraulic valves, focusing on fluid purification and contamination management. Their innovative solutions, such as coalescing filters and contamination indicators, are designed to enhance the efficiency and reliability of hydraulic systems across various industries. Hydac's commitment to quality and technology positions it as a leader in the fluid filtration sector.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

Hydac Filtertechnik Gmbh
126 Patents

#1 in Sulzbach

#471 in Germany

#6,356 in the World

Sulzbach, DE
Sulzbach, Germany

Hydac Filtertechnik Gmbh

Forward Citations = 538

90 inventors:

goldMedal Michael Otto Sakraschinsky (22 out of 25 patents)

silverMedal Norbert Sann (20 out of 20 patents)

bronzeMedal Volkmar Klein (12 out of 12 patents)

4.  Micha Kreibig (11 out of 14 patents)

5.  Werner Wilkendorf (11 out of 12 patents)

Please report any incorrect information to [email protected]
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