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For the Inventor, By the Inventor

Wuerzburg, Germany

Dbt Gmbh


USPTO Granted Patents = 63

% Expired Patents = 54.0


Trademarks = 1

Forward Citations = 314

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87 inventors (with patents filed for the assignee):

goldMedal Adam Klabisch (20 out of 34 patents)

silverMedal Gerhard Merten (17 out of 67 patents)

bronzeMedal Gerhard Siepenkort (15 out of 31 patents)

4.  Norbert Hesse (14 out of 33 patents)

5.  Klaus Duhnke (14 out of 27 patents)

6.  Uwe Tillessen (9 out of 17 patents)

7.  Michael Dettmers (7 out of 26 patents)

8.  Werner Reinelt (7 out of 25 patents)

9.  Jorg Wirtz (7 out of 10 patents)

10.  Jens Titschert (6 out of 18 patents)

11.  Frank Fischer (6 out of 15 patents)

12.  Sebastian M Mundry (6 out of 12 patents)

13.  Franz-Heinrich Suilmann (5 out of 7 patents)

14.  Hans Meya (5 out of 15 patents)

15.  Martin Broszat (5 out of 5 patents)


Core Competencies:
Hydraulic Support
Coal Plow
Electrohydraulic Control
Mining Machine
Scraper Chain
Conveyor Pan
Plough Guide
Bit Holder
Toggle Connection
Chain Drive
Mining System
Detection Device

63 patents:

1. 12272513 - Electron emitter structure, external photoelectric effect emitter, particle collecting device, tunnel surface emitter, semiconductor- based direct emitter and liquid ioniser comprising same, gas sensor comprising an emitter or emitter structure, method for generating free electrons, and method for collecting particles (2025-04-08),
2. 8038558 - Chain drive or return arrangement and chain assembly and sprocket employed therein (2011-10-18),
3. 7740421 - Arrangement for the admission of pressurized water to spray systems (2010-06-22),
4. 7731298 - Shearer-loader drive subassembly and guide shoe for it (2010-06-08),
5. 7643262 - Protection circuit for intrinsically safe electro-magnetic actuators and a protection circuit for intrinsically safe energy supply systems (2010-01-05),
6. 7641286 - Plough guide for a chain-pulled plough (2010-01-05),
7. 7631942 - Device for milling rock and other materials and method for milling rock or the like using said device (2009-12-15),
8. 7604113 - Chain wheel arrangement (2009-10-20),
9. 7600822 - Method for the mining of coal and coal planer installation (2009-10-13),
10. 7575284 - Mining plow (2009-08-18),
11. 7562764 - Entry conveyor and pan section for the same (2009-07-21),
12. 7540693 - Method for pillar recovery in chamber-and-pillar working and tubbing unit for pillar recovery (2009-06-02),
13. 7503629 - Pick locking device including a clamp element and a retaining pin (2009-03-17),
14. 7490911 - Drive device for rotating and oscillating a tool, and a compatible tool for mining (2009-02-17),
15. 7489216 - Housing cover for switching solenoid housing (2009-02-10),
Dbt GmbH, based in Wuerzburg, Germany, specializes in advanced technologies for underground mining. The company focuses on the development and manufacturing of hydraulic support systems, coal plows, and electrohydraulic control mechanisms, enhancing the efficiency and safety of mining operations. Dbt's expertise extends to mining machines, scraper chains, conveyor pans, plough guides, and bit holders, positioning it as a key player in the mining equipment sector, dedicated to innovation and reliability in challenging environments.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Oct 6 2026

Dbt Gmbh
63 Patents

#2 in

#889 in Germany

#11,617 in the World

Wuerzburg, DE
Wuerzburg, Germany

Dbt Gmbh

Forward Citations = 314

87 inventors:

goldMedal Adam Klabisch (20 out of 34 patents)

silverMedal Gerhard Merten (17 out of 67 patents)

bronzeMedal Gerhard Siepenkort (15 out of 31 patents)

4.  Norbert Hesse (14 out of 33 patents)

5.  Klaus Duhnke (14 out of 27 patents)

Please report any incorrect information to [email protected]
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