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For the Inventor, By the Inventor

Northamtonshire, United Kingdom

Dura Limited


USPTO Granted Patents = 14

% Expired Patents = 7.1

Trademarks = 1

Forward Citations = 194

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18 inventors (with patents filed for the assignee):

goldMedal Richard L Ledebuhr (2 out of 7 patents)

silverMedal Clarence M Hansen (2 out of 5 patents)

bronzeMedal Ronn J Leaf (2 out of 4 patents)

4.  Raymond E Jones (2 out of 3 patents)

5.  Thuy Pham (1 out of 1 patent)

6.  Caitlin Martin (1 out of 1 patent)

7.  Qian Wang (1 out of 1 patent)

8.  Dominic Robert Wishlade (1 out of 1 patent)

9.  George Murphy (1 out of 9 patents)

10.  Barney J Bauer (1 out of 22 patents)

11.  William Ernest Buehler (1 out of 4 patents)

12.  Attila J Tamas (1 out of 3 patents)

13.  John P Harvey (1 out of 1 patent)

14.  Clarence Arthur Van Dell (1 out of 1 patent)

15.  David L Juttelstad (1 out of 1 patent)


14 patents:

1. 11007057 - Heart valve leaflet replacement system and method for same (2021-05-18),
2. 8608260 - Integrated garage workstation (2013-12-17),
3. 4741571 - Manually foldable top for automobile vehicles (1988-05-03),
4. 4660325 - Flexible window regulator assembly (1987-04-28),
5. 4217972 - Non-metallic hydraulic lift casing (1980-08-19),
6. 4193550 - Chemical injection head (1980-03-18),
7. 4175765 - Parallel hitch for a belly mounted tractor appliance (1979-11-27),
8. 4134475 - Adjustable pad hydraulic lift (1979-01-16),
9. 4128355 - Flexible joint for suspension systems and the like (1978-12-05),
10. 4103607 - Pitting device for drupaceous fruit (1978-08-01),
11. 4097958 - Rubber torsion spring hood hinge for automotive vehicle (1978-07-04),
12. 4057137 - Method and apparatus for feeding articles onto a moving conveyor (1977-11-08),
13. 3977700 - Tandem axle suspension (1976-08-31),
14. 3933367 - Dual leaf spring suspension (1976-01-20),
Company Overview
Dura Limited is a specialized manufacturer based in Northamptonshire, UK, focusing on advanced materials and engineering solutions. The company is recognized for its expertise in developing high-performance products tailored for various industries, including automotive, aerospace, and industrial applications. Dura Limited emphasizes innovation in material science and engineering processes, aiming to enhance product durability and performance while meeting the evolving needs of its global clientele.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

14 Patents

#1 in Northamtonshire

#1,268 in United Kingdom

#42,249 in the World

Northamtonshire, GB
Northamtonshire, United Kingdom

Dura Limited

Forward Citations = 194

18 inventors:

goldMedal Richard L Ledebuhr (2 out of 7 patents)

silverMedal Clarence M Hansen (2 out of 5 patents)

bronzeMedal Ronn J Leaf (2 out of 4 patents)

4.  Raymond E Jones (2 out of 3 patents)

5.  Thuy Pham (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Dura Limited. Retrieved from https://idiyas.com/company/dura

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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