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For the Inventor, By the Inventor

Golden, CO, United States of America

Duane D Robertson

This inventor holds 9 USPTO granted patents. Top assignee: Other. Active years: 1976-2004.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Duane D Robertson. Retrieved from https://idiyas.com/inventor/duane-d-robertson

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

Calculating rank
USPTO Granted Patents = 9

% Patents Active = 88.9

Average Co-Inventor Count = 1.1

ph-index = 8

Forward Citations = 250(Granted Patents)


Location History:

  • Denver, CO (US) (1976 - 1990)
  • Golden, CO (US) (1982 - 2004)

Company Filing History:

goldMedal8 out of 834,659 
Other
 patents
where one patent can have more than one assignee

Years Active: 1976-2004

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9 patents (USPTO):Explore Patents
1. 6810587 - Combined clamping and cutting tool for plastic pipes (2004-11-02),
2. 6370780 - Spring-biased cutting tool for plastic pipes (2002-04-16),
3. 6318761 - Replacement fitting for rigid, plastic pipes (2001-11-20),
4. 5487571 - Pipe fitting (1996-01-30),
5. 4956916 - Cutting tool (1990-09-18),
6. 4789189 - Pipe saddle (1988-12-06),
7. D266736 - Cutting tool for flexible plastic conduit (1982-11-02),
8. 4336652 - Cutting tool for flexible plastic conduit (1982-06-29),
9. 3980325 - Fitting for flexible plastic pipe (1976-09-14),

Title: Duane D Robertson: Innovator in Plastic Pipe Cutting Tools

Introduction

Duane D Robertson is a notable inventor based in Golden, Colorado. He has made significant contributions to the field of tools designed for cutting plastic pipes. With a total of nine patents to his name, Robertson has developed innovative solutions that enhance efficiency and usability in pipe cutting.

Latest Patents

Robertson's latest inventions include a combined clamping and cutting tool for plastic pipes. This tool features a design that allows for manual cutting of plastic pipes with ease. The cutting portion consists of elongated members that pivotally connect, each equipped with a handle section and a cutting section. The clamping portion includes multiple members that securely hold the pipe in place during cutting. Another notable invention is a spring-biased cutting tool for plastic pipes. This tool operates in a scissors-like manner, with one jaw featuring a knife blade and the other an anvil. The design incorporates a leaf spring that biases the handles apart, allowing for easy operation when cutting pipes.

Career Highlights

Throughout his career, Duane D Robertson has focused on creating tools that improve the cutting process for plastic pipes. His innovative designs have garnered attention in the industry, showcasing his commitment to enhancing tool functionality and user experience.

Collaborations

Robertson has worked alongside talented individuals such as Rodney G May and Kit N Robertson. Their collaborative efforts have contributed to the development of effective tools in the market.

Conclusion

Duane D Robertson's contributions to the field of plastic pipe cutting tools demonstrate his innovative spirit and dedication to improving industry standards. His patents reflect a deep understanding of user needs and a commitment to practical solutions.

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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