Barnsley, United Kingdom

John G Schofield

This inventor holds 2 USPTO granted patents and 1 published patent application. Top assignee: Dunlop Gmbh. Active years: 1981.

IDiyas Innovation Intelligence. (2026). Inventor Profile: John G Schofield. Retrieved from https://idiyas.com/inventor/john-g-schofield

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

Calculating rank
USPTO Granted Patents = 2 

% Patents Active = 100.0

Average Co-Inventor Count = 2.0

ph-index = 2

Forward Citations = 24(Granted Patents)


Location History:

  • Barnsley, GB (1981)
  • Dodworth Barnsley, GB (1981)

Company Filing History:


Years Active: 1981

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2 patents (USPTO):Explore Patents

Title: Innovations by John G Schofield

Introduction

John G Schofield is a notable inventor based in Barnsley, GB. He has made significant contributions to the field of sports equipment, particularly in the design of tennis balls. With a total of 2 patents to his name, Schofield's work showcases his innovative approach to enhancing the performance of playballs.

Latest Patents

Schofield's latest patents include two groundbreaking inventions related to tennis balls. The first patent, titled "Cores for tennis balls," describes a core designed for a tennis ball that can either have an internal pressure equal to atmospheric pressure, known as a 'pressureless' ball, or a low internal pressure of up to 7 p.s.i. above atmospheric pressure, referred to as a 'low-pressure' ball. This core is made from a rubber composition that includes a significant percentage of EPM or EPDM elastomers, which are known for their durability and performance.

The second patent, "Play ball," focuses on playballs, such as tennis balls, that feature a core pressurized with a low permeability gas, like sulphur hexafluoride. This innovative design allows the ball to emit a unique pinging noise upon bouncing, enhancing the play experience. The core is designed with a profiled internal wall surface featuring depressions or protuberances, while the outer wall surface remains smooth, optimizing both performance and sound.

Career Highlights

John G Schofield has established himself as a key figure in the sports equipment industry through his work at Dunlop GmbH. His innovative designs have contributed to the advancement of tennis ball technology, making them more effective and enjoyable for players.

Collaborations

Throughout his career, Schofield has collaborated with talented individuals such as Robert C Haines and Ravi Tandon. These partnerships have fostered a creative environment that has led to the development of his innovative patents.

Conclusion

John G Schofield's contributions to the field of sports equipment, particularly through his patents on tennis ball technology, highlight his innovative spirit and dedication to enhancing athletic performance. His work continues to influence the design and functionality of playballs in the industry.

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]
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