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For the Inventor, By the Inventor

Stuttgart, Germany

Mahle Gmbh


USPTO Granted Patents = 144

% Expired Patents = 17.4


Trademarks = 4

Forward Citations = 1,151

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123 inventors (with patents filed for the assignee):

goldMedal Rainer Scharp (13 out of 67 patents)

silverMedal Peter Kemnitz (13 out of 24 patents)

bronzeMedal Emil Ripberger (10 out of 10 patents)

4.  Wolfgang Issler (9 out of 21 patents)

5.  Ulrich Bischofberger (7 out of 29 patents)

6.  Karlheinz Bing (7 out of 11 patents)

7.  Michael Ullrich (5 out of 12 patents)

8.  Martin Ruhle (5 out of 5 patents)

9.  Jurgen Ellermann (5 out of 5 patents)

10.  Gotthard Stuska (5 out of 5 patents)

11.  Dieter Gabriel (4 out of 11 patents)

12.  Michael T Lapp (4 out of 27 patents)

13.  Rolf-Gerhard Fiedler (4 out of 6 patents)

14.  Dieter Messmer (4 out of 10 patents)

15.  Hanspeter Wieland (4 out of 4 patents)


Core Competencies:
Piston
Piston Ring
Internal Combustion Engine
Cooling Channel
Metal Matrix Composite
Oil Scraper Ring
Piston Pin Bearing
Cooled Piston
Combustion Bowl
Light-Alloy Bearing
Keystone Ring
Turbocharger

144 patents:

1. 10982714 - Plain bearing and method (2021-04-20),
2. 8282748 - Process for producing metal matrix composite materials (2012-10-09),
3. 8011095 - Method for producing a piston for an internal combustion engine (2011-09-06),
4. 7892482 - Material on the basis of an aluminum alloy, method for its production, as well as use therefor (2011-02-22),
5. 7806098 - Cylinder sleeve for an internal combustion engine (2010-10-05),
6. 7685710 - Method for producing a piston for an internal combustion engine (2010-03-30),
7. 7647863 - Piston pin bearing for pistons of an internal combustion engine (2010-01-19),
8. 7628134 - Piston for an internal combustion engine (2009-12-08),
9. 7584694 - Composite piston for an internal combustion engine (2009-09-08),
10. 7572344 - Method for the production of wear-resistant sides for a keystone ring for internal combustion engine (2009-08-11),
11. 7464684 - Composite piston for an internal combustion engine (2008-12-16),
12. 7431305 - Oil scraper ring ring groove arrangement for pistons of internal combustion engines (2008-10-07),
13. 7415959 - Cooling channel cover for a piston of an internal combustion engine (2008-08-26),
14. 7409903 - One-piece piston for an internal combustion engine (2008-08-12),
15. 7396018 - Oil scraper ring for pistons of internal combustion engines (2008-07-08),
Mahle GmbH, headquartered in Stuttgart, Germany, is a leading global supplier in the automotive industry, specializing in internal combustion engine components. The company focuses on the development and manufacturing of critical technologies such as pistons, piston rings, and oil scraper rings, alongside innovations in cooling channels and metal matrix composites. Mahle's expertise extends to enhancing engine efficiency and performance, positioning it as a key player in the evolution of automotive engineering and sustainable mobility solutions.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

Mahle Gmbh
144 Patents

#15 in

#425 in

#5,647 in the World

Stuttgart, DE
Stuttgart, Germany

Mahle Gmbh

Forward Citations = 1,151

123 inventors:

goldMedal Rainer Scharp (13 out of 67 patents)

silverMedal Peter Kemnitz (13 out of 24 patents)

bronzeMedal Emil Ripberger (10 out of 10 patents)

4.  Wolfgang Issler (9 out of 21 patents)

5.  Ulrich Bischofberger (7 out of 29 patents)

Please report any incorrect information to [email protected]
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