For the Inventor, By the Inventor

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Brookfield, WI, United States of America

Harnischfeger Corporation

USPTO Granted Patents = 184

CIPO Patents = 2

Trademarks = 5

Forward Citations = 2,302

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144 inventors (with patents filed for the assignee):

Harvey J Kallenberger (19 out of 26 patents)

Narahari Gattu (9 out of 9 patents)

Roger D Luebke (8 out of 8 patents)

4. Herbert D Long, Jr (6 out of 6 patents)

5. Robert A Fritsch (6 out of 6 patents)

6. George E Thorsen (5 out of 6 patents)

7. Darryl R Immel (5 out of 5 patents)

8. Ram N Rathi (5 out of 5 patents)

9. Andrew P Dretzka (4 out of 4 patents)

10. Max J Dechantsreiter (4 out of 4 patents)

11. Lembit Vaerk (4 out of 4 patents)

12. John E Wieschel (4 out of 4 patents)

13. Lawrence A Millonzi (4 out of 4 patents)

14. Dieter C Juergens (4 out of 4 patents)

15. Rikos A Kasim (3 out of 10 patents)

Core Competencies:

Material Handling

Dragline

Crane

Hoist

Digger

Excavation

Mining

Lifting Mechanisms

Automation

Overload Sensing

Welding

Drive Systems

184 patents: Sort by Forward Citations

1. 6025686 - Method and system for controlling movement of a digging dipper (2000-02-15),

2. 5865557 - Clevis with improved pin locking assembly (1999-02-02),

3. 5815960 - Retarding mechanism for the dipper door of a mining shovel (1998-10-06),

4. 5791257 - Overhead crane with adjustable bearings (1998-08-11),

5. 5788096 - Material-handling machine with hinged leg (1998-08-04),

6. 5752334 - Dumping system for a dragline bucket (1998-05-19),

7. 5730855 - Hoist apparatus and method for positioning anode in smelting furnace (1998-03-24),

8. 5706736 - Polar crane and related method (1998-01-13),

9. 5676471 - Dragline with improved thrust bearing assembly supporting upper structure (1997-10-14),

10. 5662311 - Lifting apparatus including overload sensing device (1997-09-02),

11. 5657559 - Rigging assembly for an excavating bucket (1997-08-19),

12. 5653297 - Blasthole drill with improved automatic breakout wrench (1997-08-05),

13. 5642577 - Dragline with high headroom between upper and lower structures (1997-07-01),

14. 5636460 - Dragline with cantilevered side-access dump block (1997-06-10),

15. 5636459 - Dragline including improved boom (1997-06-10),

Harnischfeger Corporation is a global industrial equipment manufacturer, specializing in the design, manufacture, and distribution of heavy machinery. With over 100 years of experience, we offer innovative solutions for industries such as construction, mining, and material handling. Our products are known for their reliability, durability, and superior performance. Visit our website for more information.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Sep 15 2026

184 Patents

#2 in Brookfield, WI

#44 in Wisconsin

#2,209 in US

#4,542 in the World

Brookfield, WI, United States of America

Harnischfeger Corporation

Forward Citations = 2,302

144 inventors:

Harvey J Kallenberger (19 out of 26 patents)

Narahari Gattu (9 out of 9 patents)

Roger D Luebke (8 out of 8 patents)

4. Herbert D Long, Jr (6 out of 6 patents)

5. Robert A Fritsch (6 out of 6 patents)

Please report any incorrect information to [email protected]

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