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Kingston, Canada

Urban Transportation Development Corporation Limited

USPTO Granted Patents = 25

Forward Citations = 279

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17 inventors (with patents filed for the assignee):

Roy E Smith (9 out of 13 patents)

Dennis P Chadwick (5 out of 10 patents)

W John Ballantyne (2 out of 2 patents)

4. George Sobolewski (2 out of 3 patents)

5. Heinz W Becker (2 out of 2 patents)

6. Harry Skoblenick (1 out of 4 patents)

7. William A Spurr (1 out of 1 patent)

8. William C Beattie (1 out of 1 patent)

9. John Stannard (1 out of 3 patents)

10. Josef Eichenhofer (1 out of 4 patents)

11. Karl Schubert (1 out of 1 patent)

12. Fred S Whitfield (1 out of 1 patent)

13. David H Woods (1 out of 1 patent)

14. Allen K Wallace (1 out of 1 patent)

15. Ernest Waddington (1 out of 1 patent)

25 patents: Sort by Forward Citations

1. 5127337 - Reaction rail (1992-07-07),

2. 4911360 - Precast railway crossing slab (1990-03-27),

3. 4846126 - Natural gas fuel injection (1989-07-11),

4. 4819566 - Stabilized steerable truck (1989-04-11),

5. 4817534 - Present invention relates to rail vehicles (1989-04-04),

6. 4802419 - Steered axle for a railway vehicle (1989-02-07),

7. 4742780 - Load distribution system for railway truck (1988-05-10),

8. 4729455 - Wheel assembly and brake therefor (1988-03-08),

9. 4700854 - Open top draw bar arrangement having removable wedge (1987-10-20),

10. 4679665 - Brake disc design for wheel mounted discs (1987-07-14),

11. 4671577 - Combined regenerative and friction braking system for a vehicle (1987-06-09),

12. 4642493 - Integrally air cooled linear induction motor (1987-02-10),

13. 4635560 - Contactless powering of LIM vehicle electrical system by recovery of LIM (1987-01-13),

14. 4570544 - Diagonally braced rail truck (1986-02-18),

15. 4542700 - Three axle steered truck (1985-09-24),

The Urban Transportation Development Corporation Limited (UTDC) is a leading company in the transportation sector. With a focus on urban transportation solutions, UTDC develops and implements cutting-edge technologies and systems to improve public transportation infrastructures. Our expertise includes the design, manufacturing, and maintenance of advanced rail-based systems, such as light rail transit (LRT) and metro systems. Through our innovative approach and commitment to sustainability, we aim to provide efficient and reliable transportation solutions for urban communities.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 16 2025

25 Patents

#3 in Kingston

#540 in Canada

#24,928 in the World

Kingston, Canada

Urban Transportation Development Corporation Limited

Forward Citations = 279

17 inventors:

Roy E Smith (9 out of 13 patents)

Dennis P Chadwick (5 out of 10 patents)

W John Ballantyne (2 out of 2 patents)

4. George Sobolewski (2 out of 3 patents)

5. Heinz W Becker (2 out of 2 patents)

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