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For the Inventor, By the Inventor

Duisburg, Germany

Mannesmann Demag A.g.


USPTO Granted Patents = 40

Trademarks = 4

Forward Citations = 398

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70 inventors (with patents filed for the assignee):

goldMedal Gunter Ratschat (4 out of 4 patents)

silverMedal Klaus Becker (3 out of 24 patents)

bronzeMedal Gunter Schmitz (3 out of 11 patents)

4.  Uwe Lichtenvort (2 out of 16 patents)

5.  Karlheinz Langlitz (2 out of 13 patents)

6.  Harald Bitsch (2 out of 14 patents)

7.  Dietmar Lohse (2 out of 8 patents)

8.  Manfred Stoeber (2 out of 3 patents)

9.  Karl-Ernst Kaufmann (2 out of 5 patents)

10.  Gerhard Komma (2 out of 3 patents)

11.  Manfred Driemeyer (2 out of 2 patents)

12.  Reiner Kopp (1 out of 9 patents)

13.  Karl Zacharias (1 out of 14 patents)

14.  Klaus-Dieter Oemus (1 out of 7 patents)

15.  Heinz Hasselmann (1 out of 17 patents)


Core Competencies:
Metal Parts Production
Lifting Block
Thermal Parting
Heat Recovery
Electro-Metal Smelting
Crane Systems
Metallurgical Vessels
Steel Manufacturing
Transport Apparatus
Dust Removal
Ozone Production
Switching Apparatus

40 patents:

1. 4967826 - Process for producing metal parts (1990-11-06),
2. D300077 - Double sheave lifting block (1989-02-28),
3. D300076 - Single sheave lifting block (1989-02-28),
4. 4602967 - Method and apparatus for thermal longitudinal parting of rectangular (1986-07-29),
5. 4541864 - Method and apparatus for recovery and recycling of heat from hot gases (1985-09-17),
6. 4478393 - Apparatus for thermal longitudinal parting of rectangular metal plate (1984-10-23),
7. 4434004 - Method for recovery and recycling of heat from hot gases in (1984-02-28),
8. 4432672 - Canal building apparatus (1984-02-21),
9. 4401296 - Electro-metal smelting furnace with taphole arranged at the bottom (1983-08-30),
10. 4392434 - Turbulent waterway (1983-07-12),
11. 4385562 - Traveling crane with top girders at the end of a bridge girder (1983-05-31),
12. 4364704 - Grab bucket suspended from hoisting installation (1982-12-21),
13. 4360305 - Distribution apparatus for throat closures of shaft furnaces, in (1982-11-23),
14. 4354670 - Lining apparatus for metallurgical vessels, particularly for steel mill (1982-10-19),
15. 4354669 - Apparatus for regulating the quantities and percentages of the gaseous (1982-10-19),
Company Overview
Mannesmann Demag A.G., headquartered in Duisburg, Germany, specializes in the production of advanced metal parts and equipment essential for various industrial applications. The company is recognized for its expertise in lifting blocks, thermal parting technologies, and heat recovery systems, contributing significantly to the efficiency of manufacturing processes. Additionally, Mannesmann Demag is involved in canal building, electro-metal smelting, and the development of metallurgical vessels, playing a vital role in steel manufacturing and related sectors.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

40 Patents

#8 in Duisburg

#1,277 in Germany

#17,068 in the World

Duisburg, DE
Duisburg, Germany

Mannesmann Demag A.g.

Forward Citations = 398

70 inventors:

goldMedal Gunter Ratschat (4 out of 4 patents)

silverMedal Klaus Becker (3 out of 24 patents)

bronzeMedal Gunter Schmitz (3 out of 11 patents)

4.  Uwe Lichtenvort (2 out of 16 patents)

5.  Karlheinz Langlitz (2 out of 13 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Mannesmann Demag A.g.. Retrieved from https://idiyas.com/company/mannesmann-demag-a-g

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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