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Ludwigsburg, Germany

Filterwerk Mann + Hummel Gmbh

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USPTO Granted Patents = 303

% Expired Patents = 14.2

CIPO Patents = 1

Trademarks = 4

Forward Citations = 6,364

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285 inventors (with patents filed for the assignee):

Arthur Klotz (29 out of 34 patents)

Rudolf Leipelt (27 out of 29 patents)

Volker Ernst (22 out of 23 patents)

4. Herbert Jainek (19 out of 44 patents)

5. Thomas Jessberger (17 out of 76 patents)

6. Herbert Pietrowski (12 out of 17 patents)

7. Heinz Mueller (12 out of 12 patents)

8. Helmut Neuschwander (11 out of 13 patents)

9. Martin Weindorf (10 out of 47 patents)

10. Klaus Moessinger (10 out of 15 patents)

11. Helmut Luka (10 out of 12 patents)

12. Bruno Sommer (10 out of 10 patents)

13. Heinz Andress (10 out of 10 patents)

14. Hans Erdmannsdoerfer (10 out of 10 patents)

15. Hans Erdmannsdorfer (10 out of 11 patents)

Core Competencies:

Centrifugal Separator

Liquid Filter

Intake System

Air Filter

Filter Cartridge

Crankcase Ventilation

Control Valve Assembly

Replaceable Filter

Internal Combustion Engine

Monitoring System

Air Intake Device

Fluid Inlet

303 patents: Sort by Forward Citations

1. RE39704 - Centrifugal separator with weight thrust bearing (2007-06-25),

2. 7192518 - Liquid circuit (2007-03-20),

3. 7152745 - Filter bypass monitoring system (2006-12-26),

4. 7137510 - Filter element (2006-11-21),

5. 7025029 - Air intake tube for an internal combustion engine (2006-04-11),

6. 6994768 - Cylindrical filter element (2006-02-07),

7. 6973925 - Ventilation device for crankcase (2005-12-13),

8. 6966981 - Replaceable filter cartridge with support element and liquid filter with such a filter cartridge (2005-11-22),

9. RE38855 - Centrifugal separator with one or more internal contaminant barriers (2005-10-24),

10. 6942709 - Switchable cyclone for separating particles or droplets from a fluid stream (2005-09-13),

11. 6911142 - Overhead return piping system (2005-06-28),

12. 6893571 - Method and apparatus for storing water separated from fuel (2005-05-17),

13. 6893561 - Liquid filter with a cast metal housing and method of producing the same (2005-05-17),

14. 6886517 - Intake device for an internal combustion engine having impulse charging (2005-05-03),

15. 6884273 - Multicell cyclone and method for producing it (2005-04-26),

Company Overview

Filterwerk Mann + Hummel GmbH, headquartered in Ludwigsburg, Germany, specializes in fluid filtration technologies. The company develops and manufactures a wide range of filtration solutions, including centrifugal separators, liquid filters, and air filters, catering to various industries such as automotive and industrial applications. Their expertise extends to advanced components like intake systems, filter cartridges, and crankcase ventilation systems, emphasizing innovation and efficiency in fluid management.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Nov 3 2026

303 Patents

#2 in Ludwigsburg

#198 in Germany

#2,950 in the World

Ludwigsburg, Germany

Filterwerk Mann + Hummel Gmbh

Forward Citations = 6,364

285 inventors:

Arthur Klotz (29 out of 34 patents)

Rudolf Leipelt (27 out of 29 patents)

Volker Ernst (22 out of 23 patents)

4. Herbert Jainek (19 out of 44 patents)

5. Thomas Jessberger (17 out of 76 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Filterwerk Mann + Hummel Gmbh. Retrieved from https://idiyas.com/company/filterwerk-mann-plus-hummel

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]

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