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For the Inventor, By the Inventor

Avondale, PA, United States of America

Edgecraft Corporation

USPTO Granted Patents = 92

% Expired Patents = 8.7



Trademarks = 40

Forward Citations = 2,076

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36 inventors (with patents filed for the assignee):

goldMedal Daniel D Friel, Sr (68 out of 75 patents)

silverMedal Daniel D Friel, Jr (39 out of 40 patents)

bronzeMedal Bela Elek (25 out of 25 patents)

4.  Samuel Weiner (18 out of 18 patents)

5.  Thomas M Huber (13 out of 19 patents)

6.  Robert P Bigliano (13 out of 13 patents)

7.  Abraham Leibson (13 out of 16 patents)

8.  George C Jensen (7 out of 7 patents)

9.  James P Fitzgerald (5 out of 25 patents)

10.  H William Busch, Jr (3 out of 4 patents)

11.  Terry Hall (3 out of 3 patents)

12.  Cassandra Wilson Gluyas (2 out of 2 patents)

13.  Thomas Walter Gluyas (2 out of 2 patents)

14.  Tom Long (2 out of 2 patents)

15.  Eckhard Siegler (2 out of 4 patents)


Core Competencies:
Knife Sharpener
Electric Sharpener
Manual Sharpener
Precision Control
Two Stage Sharpener
Food Slicer
Cross-Grind Sharpener
Ceramic Blades
Hunting Knives
Combination Sharpener
Wear Observation
Portable Sharpener

92 patents:

1. 11826869 - Knife and tool sharpener (2023-11-28),
2. 11478890 - Assembly for sharpening and observing wear on a blade (2022-10-25),
3. D863914 - Sharpener (2019-10-22),
4. D813004 - Compact manual sharpener (2018-03-20),
5. D803648 - Two stage electric sharpener (2017-11-28),
6. 9656372 - Sharpener for thick knives (2017-05-23),
7. 9649749 - Manual sharpener (2017-05-16),
8. D769665 - Kettle (2016-10-25),
9. 9386880 - Waffle maker (2016-07-12),
10. 9333613 - Sharpener for knives with widely different edge angles (2016-05-10),
11. D754514 - Compact manual sharpener (2016-04-26),
12. 9242331 - Electric sharpener for ceramic and metal blades (2016-01-26),
13. 9168627 - Knife sharpener for asian and european/american knives (2015-10-27),
14. D736029 - Table top grill (2015-08-11),
15. D721937 - Electric knife sharpener (2015-02-03),
Company Overview
Edgecraft Corporation, based in Avondale, PA, specializes in the development and manufacturing of innovative knife sharpening solutions. The company is renowned for its precision-engineered products, including electric and manual sharpeners that enhance the performance and longevity of various cutting tools. With a focus on advanced technologies such as two-stage sharpening and cross-grind techniques, Edgecraft caters to both culinary enthusiasts and professionals, ensuring optimal sharpness for kitchen knives and food slicers.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

92 Patents

#1 in Avondale, PA

#160 in Pennsylvania

#4,083 in US

#8,392 in the World

Avondale, PA (US)
Avondale, PA, United States of America

Edgecraft Corporation

Forward Citations = 2,076

36 inventors:

goldMedal Daniel D Friel, Sr (68 out of 75 patents)

silverMedal Daniel D Friel, Jr (39 out of 40 patents)

bronzeMedal Bela Elek (25 out of 25 patents)

4.  Samuel Weiner (18 out of 18 patents)

5.  Thomas M Huber (13 out of 19 patents)

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

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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