Harry J Ledgerwood

This inventor holds 6 USPTO granted patents. Top assignees: Plessey Incorporated, Tyler Pipe Company, a Div. of Ransom Industries, Inc.. Active years: 1977-1997.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Harry J Ledgerwood. Retrieved from https://idiyas.com/inventor/harry-j-ledgerwood

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

USPTO Granted Patents = 6

% Patents Active = 100.0

Average Co-Inventor Count = 1.0

ph-index = 5

Forward Citations = 76(Granted Patents)

Location History:

Conway, MO (US) (1977 - 1986)
Marshfield, MO (US) (1985 - 1997)

Company Filing History:

Tyler Pipe Company, a Div. of Ransom Industries, Inc.

patents

Years Active: 1977-1997

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6 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5649713 - Gasket for hub and spigot pipe joints (1997-07-22),

2. 4580710 - Stock feeder with hydraulic shock absorber (1986-04-08),

3. 4538839 - Pipe joint coupling (1985-09-03),

4. 4513899 - Stock feeder with adjustable width feed path (1985-04-30),

5. 4493447 - High speed article feeding apparatus (1985-01-15),

6. 4059212 - Stock feeder for punched stock (1977-11-22),

Title: The Innovative Contributions of Harry J Ledgerwood

Introduction

Harry J Ledgerwood is a notable inventor based in Conway, MO (US). He has made significant contributions to the field of engineering with a total of 6 patents to his name. His inventions reflect a commitment to improving industrial processes and enhancing product functionality.

Latest Patents

Among his latest patents is the "Gasket for Hub and Spigot Pipe Joints." This invention features an elastomeric gasket with an annular body that includes a flanged edge, a sealing bead, and a semi-circular locking bead for easy insertion. The inner surface is designed with multiple flexible angularly inwardly-extending lips that provide self-sealing capabilities under pressure. Another significant invention is the "Stock Feeder with Hydraulic Shock Absorber." This device is designed for the repetitive feeding of uniform segments of stock material from a roll to a production machine. It includes a frame, hold clamps, and a movable feed block equipped with feed clamps. The design allows for lateral adjustments and incorporates a double-acting hydraulic shock absorber to enhance operational speed while maintaining accuracy.

Career Highlights

Throughout his career, Harry has worked with reputable companies such as Plessey Incorporated and Tyler Pipe Company, a division of Ransom Industries, Inc. His experience in these organizations has contributed to his innovative mindset and technical expertise.

Collaborations

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Conclusion

Harry J Ledgerwood's inventive spirit and practical solutions have made a lasting impact in his field. His patents demonstrate a blend of creativity and engineering prowess that continues to influence industrial practices today.

Profile summary based on public USPTO records.

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]