For the Inventor, By the Inventor

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Friedrichshafen, Germany

Rt-Filtertechnik Gmbh

USPTO Granted Patents = 15

EPO Patents = 24

Trademarks = 1

Forward Citations = 20

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19 inventors (with patents filed for the assignee):

Gerhard Stehle (8 out of 9 patents)

Marco Bautz (6 out of 6 patents)

Frank Oberli (3 out of 3 patents)

4. Dirk Schönfeld (3 out of 3 patents)

5. Dirk Schoenfeld (2 out of 2 patents)

6. Andreas Steiche (1 out of 1 patent)

7. Robert Kessel (1 out of 1 patent)

8. Alexander Wohlers (1 out of 4 patents)

9. Uwe Fries (1 out of 1 patent)

10. Carsten Grobe (1 out of 1 patent)

11. Michael Otto Sakraschinsky (1 out of 25 patents)

12. John Otto (1 out of 2 patents)

13. Mathias Dieter (1 out of 1 patent)

14. Florentin Van Uffelen (1 out of 2 patents)

15. Alexander Backes (1 out of 1 patent)

15 patents: Sort by Forward Citations

1. 12350607 - Filter device (2025-07-08),

2. 12121832 - Filter device (2024-10-22),

3. 12109515 - Filter device (2024-10-08),

4. 11806644 - Filter device (2023-11-07),

5. 11642611 - Filter element (2023-05-09),

6. RE49220 - Filter element (2022-09-26),

7. 11135531 - Filter device (2021-10-05),

8. 10786775 - Separating device (2020-09-29),

9. 10617981 - Filter device for fluids (2020-04-14),

10. 10478759 - Filter element (2019-11-19),

11. 10421031 - Filter device (2019-09-24),

12. 10406457 - Filter device (2019-09-10),

13. 10369499 - Filter device and filter element (2019-08-06),

14. 10213709 - Filter element and hydraulic circuit with such a filter element (2019-02-26),

15. 9849408 - Filter element (2017-12-26),

Rt-Filtertechnik GmbH, based in Friedrichshafen, Germany, specializes in the development and manufacturing of advanced filtration systems. The company focuses on providing innovative solutions for various industries, including automotive, aerospace, and industrial applications. With a commitment to quality and efficiency, Rt-Filtertechnik leverages cutting-edge technology to enhance filtration processes, ensuring optimal performance and compliance with environmental standards. Their expertise positions them as a key player in the filtration technology sector.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

15 Patents

#9 in Friedrichshafen

#2,768 in Germany

#39,846 in the World

Friedrichshafen, Germany

Rt-Filtertechnik Gmbh

Forward Citations = 20

19 inventors:

Gerhard Stehle (8 out of 9 patents)

Marco Bautz (6 out of 6 patents)

Frank Oberli (3 out of 3 patents)

4. Dirk Schönfeld (3 out of 3 patents)

5. Dirk Schoenfeld (2 out of 2 patents)

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