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For the Inventor, By the Inventor

Buffalo, NY, United States of America

Harper International Corporation


USPTO Granted Patents = 13

% Expired Patents = 7.7



Trademarks = 7

Forward Citations = 84

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17 inventors (with patents filed for the assignee):

goldMedal Edward V McCormick (5 out of 7 patents)

silverMedal Bruce J Dover (5 out of 6 patents)

bronzeMedal William J Stry (4 out of 4 patents)

4.  Renee M Bagwell (2 out of 2 patents)

5.  David M Bencic (2 out of 4 patents)

6.  Carl H Vander Weide (2 out of 2 patents)

7.  Peter R Witting (1 out of 1 patent)

8.  Jeffrey E Purdy (1 out of 1 patent)

9.  Jason A Ginn (1 out of 1 patent)

10.  Charles Miller (1 out of 1 patent)

11.  Uwe Hoechst (1 out of 1 patent)

12.  Ludger Fischer (1 out of 2 patents)

13.  Brian A Polino (1 out of 1 patent)

14.  Douglas E Ludwig (1 out of 1 patent)

15.  Edgard Matrak (1 out of 2 patents)


13 patents:

1. 9618228 - Airflow distribution system (2017-04-11),
2. 9255733 - Oven for fiber heat treatment (2016-02-09),
3. 8485815 - Overhung rotary tube furnace (2013-07-16),
4. 6910882 - Vertical conveyor apparatus for high temperature continuous processing of materials (2005-06-28),
5. 6569222 - Continuous single stage process for the production of molybdenum metal (2003-05-27),
6. 6514072 - Method of processing carbon fibers (2003-02-04),
7. 6464493 - Multi-axis rotary seal system (2002-10-15),
8. 6328558 - Purge chamber (2001-12-11),
9. 6031207 - Sintering kiln (2000-02-29),
10. 5997289 - Rotary calciner with mixing flights (1999-12-07),
11. 5927969 - Batch system cross-flow rotary calciner (1999-07-27),
12. 5908291 - Continuous cross-flow rotary kiln (1999-06-01),
13. 5906483 - Rotary film calciner (1999-05-25),
Harper International Corporation is a leading provider of thermal processing solutions, specializing in the design and manufacture of advanced systems for the production of materials such as ceramics, metals, and composites. With a focus on innovation, Harper develops custom equipment and processes that enhance efficiency and performance in various industries. Headquartered in Buffalo, NY, the company leverages its expertise to serve clients globally, ensuring high-quality solutions tailored to meet specific material processing needs.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Oct 6 2026

13 Patents

#29 in Buffalo, NY

#1,374 in New York

#23,815 in US

#44,988 in the World

Buffalo, NY (US)
Buffalo, NY, United States of America

Harper International Corporation

Forward Citations = 84

17 inventors:

goldMedal Edward V McCormick (5 out of 7 patents)

silverMedal Bruce J Dover (5 out of 6 patents)

bronzeMedal William J Stry (4 out of 4 patents)

4.  Renee M Bagwell (2 out of 2 patents)

5.  David M Bencic (2 out of 4 patents)

Please report any incorrect information to [email protected]
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