For the Inventor, By the Inventor

Enter assignee name

Mount Gilead, OH, United States of America

Hpm Corporation

Calculating rank

USPTO Granted Patents = 39

Trademarks = 1

Forward Citations = 507

Loading Chart...

Loading Chart...

23 inventors (with patents filed for the assignee):

George A Kruder (10 out of 12 patents)

William N Calland (5 out of 5 patents)

Thomas G Bishop (5 out of 8 patents)

4. Robert E Nunn (5 out of 6 patents)

5. Stephen T Takashima (3 out of 3 patents)

6. John C Medici, Jr (3 out of 3 patents)

7. Bruno J Stillhard (3 out of 3 patents)

8. Donald W Staiger (3 out of 4 patents)

9. Ronald Siegrist (2 out of 8 patents)

10. James H Perkins (2 out of 2 patents)

11. Charles C Treisch, Jr (2 out of 2 patents)

12. Howard E Radel (2 out of 2 patents)

13. Gary L Myers (2 out of 3 patents)

14. William T Flickinger (2 out of 3 patents)

15. Larry A Rosenbaum (2 out of 3 patents)

Core Competencies:

Injection Molding

Multichannel Wave Screw

Hydraulic Drive

Plasticating Apparatus

Extrusion Method

Process Control

Coextrusion Feedblock

Die Casting

Mold Access

Mixing Screw

Thermoplastic

Thermosetting

39 patents: Sort by Forward Citations

1. 6234659 - Surge suppressor for vented injection molding machine screw (2001-05-22),

2. 6179600 - Process and device for hydraulic drive of injection molding machines (2001-01-30),

3. 6132075 - Multichannel wave screw with a slush channel barrier section (2000-10-17),

4. 6056430 - Plasticating apparatus having a multichannel wave screw with a cross (2000-05-02),

5. 5565224 - Electric injection molding machine (1996-10-15),

6. 5529478 - Device for hydraulic drive of injection molding machines (1996-06-25),

7. 5397526 - Method for reconfiguring finishing rolls in a plastic sheet fabrication (1995-03-14),

8. 5375992 - Triple channel wave screw (1994-12-27),

9. 5219590 - Triple channel wave screw (1993-06-15),

10. 5035509 - Multi-channel extrusion screw with a zig-zag undercut barrier (1991-07-30),

11. 4997358 - Apparatus for reconfiguring finishing rolls in a plastic sheet (1991-03-05),

12. 4925313 - Mixing screw for extrusion and injection molding (1990-05-15),

13. 4886106 - Die cast machine with a turret (1989-12-12),

14. 4850217 - Adaptive process control for injection molding (1989-07-25),

15. 4816197 - Adaptive process control for injection molding (1989-03-28),

Company Overview

HPM Corporation, based in Mount Gilead, Ohio, specializes in the design and manufacturing of advanced machinery and equipment for various industries. The company focuses on providing innovative solutions in the fields of plastics, rubber, and metal processing, emphasizing precision engineering and efficiency. HPM is recognized for its commitment to quality and customer satisfaction, leveraging its expertise to deliver tailored products that meet the evolving needs of its clients across diverse sectors.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

39 Patents

#1 in Mount Gilead, OH

#375 in Ohio

#8,835 in US

#17,475 in the World

Mount Gilead, OH, United States of America

Hpm Corporation

Forward Citations = 507

23 inventors:

George A Kruder (10 out of 12 patents)

William N Calland (5 out of 5 patents)

Thomas G Bishop (5 out of 8 patents)

4. Robert E Nunn (5 out of 6 patents)

5. Stephen T Takashima (3 out of 3 patents)

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

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]

Loading…