Greenville, DE, United States of America

Daniel D Friel, Sr

This inventor holds 75 USPTO granted patents and 1 published patent application, plus 1 CIPO patent and 4 EPO patents, primarily in Knife Sharpening Technology (CPC class 4512). Top assignees: Edgecraft Corporation, E.i. Dupont De Nemours and Company, Ed. Wuesthof Dreizackwerk Kg. Active years: 1978-2016.

USPTO Granted Patents = 75 

% Patents Active = 96.0


 

Average Co-Inventor Count = 1.6

ph-index = 28

Forward Citations = 2,035(Granted Patents)

Forward Citations (Not Self Cited) = 1,322(Dec 10, 2025)


Inventors with similar research interests:


Company Filing History:


Years Active: 1978-2016

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Areas of Expertise:
Knife Sharpener
Precision Sharpening
Manual Sharpener
Cross-Grind Sharpener
Three Stage Sharpener
Electric Knife Sharpener
Food Slicer
Waffle Maker
Beverage Brewing Apparatus
Temperature Measurement
High Speed Baking
75 patents (USPTO):Explore Patents

Title: The Innovative Journey of Daniel D. Friel, Sr.

Introduction

Daniel D. Friel, Sr., based in Greenville, DE, is a prominent inventor with an impressive portfolio of 75 patents. His work spans various industries, showcasing his ability to combine practical needs with inventive solutions. With a focus on consumer products, particularly in cooking and tool sharpening, Friel's innovations have made a significant impact.

Latest Patents

Among his latest inventions, Friel developed a state-of-the-art waffle maker designed with upper and lower baking plates, each powered by heating elements. This waffle maker features a power control unit that responds to a temperature sensing unit, ensuring precise temperature maintenance throughout the baking process. Additionally, it includes a manually adjustable timer to control the duration of each baking cycle, elevating the user experience in preparing perfect waffles.

Another notable invention is a knife sharpener that accommodates a wide range of knives, including Western, Asian, and traditional Japanese styles. This electric knife sharpener integrates multiple sharpening stages, each designed to position the blade at specific angles for optimal sharpening results. The device includes advanced features such as rotating abrasive disks and a stropping stage, highlighting Friel’s commitment to versatility and precision in kitchen tools.

Career Highlights

Daniel D. Friel, Sr. has contributed significantly to the field of product development, particularly through his role at Edgecraft Corporation. Here, he applied his innovative thinking to create high-quality consumer products that meet the needs of everyday users. His vast experience and expertise have established him as a reliable figure in product innovation.

Collaborations

Throughout his career, Friel has collaborated with esteemed colleagues, including Daniel D. Friel, Jr. and Bela Elek. These partnerships reflect a shared commitment to advancing technology and improving consumer products through collaboration and innovative thinking.

Conclusion

Daniel D. Friel, Sr. is a remarkable inventor whose contributions continue to enhance our daily lives through practical innovations. His patents, particularly in the realm of kitchen appliances and tools, demonstrate a dedication to improving user experience and functionality. As he continues to innovate, the impact of his work will undoubtedly resonate within the industry for years to come.

Profile summary based on public USPTO records.
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