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For the Inventor, By the Inventor

Mount Gilead, OH, United States of America

Hpm Corporation


USPTO Granted Patents = 39

Trademarks = 1

Forward Citations = 505

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23 inventors (with patents filed for the assignee):

goldMedal George A Kruder (10 out of 12 patents)

silverMedal William N Calland (5 out of 5 patents)

bronzeMedal 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:

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),
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 based on public USPTO records.

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USPTO Data Jan 1 1976 - Oct 6 2026

Hpm Corporation
39 Patents

#1 in Mount Gilead, OH

#374 in Ohio

#8,814 in US

#17,428 in the World

Mount Gilead, OH (US)
Mount Gilead, OH, United States of America

Hpm Corporation

Forward Citations = 505

23 inventors:

goldMedal George A Kruder (10 out of 12 patents)

silverMedal William N Calland (5 out of 5 patents)

bronzeMedal 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)

Please report any incorrect information to [email protected]
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