For the Inventor, By the Inventor

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Brookfield, WI, United States of America

Harnischfeger Corporation

Calculating rank

USPTO Granted Patents = 184

CIPO Patents = 2

Trademarks = 5

Forward Citations = 2,321

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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. Robert H Blaszynski (4 out of 4 patents)

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

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

12. Lembit Vaerk (4 out of 4 patents)

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

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

15. Dieter C Juergens (4 out of 4 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),

Company Overview

Harnischfeger Corporation, headquartered in Brookfield, Wisconsin, specializes in the design and manufacture of advanced material handling equipment. The company is recognized for its expertise in developing technologies related to cranes, hoists, draglines, and excavation machinery, serving various industries including mining and construction. Harnischfeger's innovative lifting mechanisms enhance operational efficiency and safety, positioning the company as a key player in the material handling sector.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

184 Patents

#2 in Brookfield, WI

#44 in Wisconsin

#2,215 in US

#4,554 in the World

Brookfield, WI, United States of America

Harnischfeger Corporation

Forward Citations = 2,321

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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Harnischfeger Corporation. Retrieved from https://idiyas.com/company/harnischfeger

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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