For the Inventor, By the Inventor

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Chicago, IL, United States of America

Learning Curve International Inc.

USPTO Granted Patents = 11

Trademarks = 1

Forward Citations = 92

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18 inventors (with patents filed for the assignee):

Donald E Toht (9 out of 11 patents)

K Dale Weathington (4 out of 4 patents)

Richard Rothkopf (4 out of 4 patents)

4. Gary D Aigner (3 out of 7 patents)

5. Lisa Ellen Gelfond (2 out of 6 patents)

6. Will Isaksson (2 out of 4 patents)

7. Lin Ming Chuan Cindy (2 out of 2 patents)

8. Mary Lenehan (2 out of 2 patents)

9. Michael G Wilhelm (2 out of 2 patents)

10. Paul Dowd (2 out of 21 patents)

11. Mitchell P Pomerantz (1 out of 7 patents)

12. Gregory R Kieso (1 out of 1 patent)

13. Robert Cecchini (1 out of 1 patent)

14. Jeff Katz (1 out of 2 patents)

15. Jeffry Han Katz (1 out of 2 patents)

11 patents: Sort by Forward Citations

1. 6722941 - Toy vehicle magnetic coupler (2004-04-20),

2. 6648237 - Toy vehicle track segment and method of manufacturing a toy vehicle track segment (2003-11-18),

3. 6645031 - Playboard with collapsing easel (2003-11-11),

4. D481424 - Toy track segment (2003-10-29),

5. D477641 - Edges of supports for playboard with easel (2003-07-23),

6. 6592427 - Toy vehicle grain loader accessory (2003-07-15),

7. 6312311 - Water tower assembly with variable water level (2001-11-06),

8. 6089952 - Four wheel drive toy locomotive (2000-07-18),

9. 6015329 - Toy vehicle logging mill accessory (2000-01-18),

10. 5979783 - Toy vehicle track coupling support (1999-11-09),

11. 5826835 - Toy vehicle switch track (1998-10-27),

Learning Curve International Inc. is a leading provider of educational resources and services for students, educators, and institutions. With a focus on innovative and engaging learning solutions, we offer a wide range of products such as textbooks, e-learning platforms, and professional development programs. Our mission is to empower learners and educators to achieve success and reach their full potential in the ever-evolving education landscape.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 2 2025

11 Patents

#307 in Chicago, IL

#1,296 in Illinois

#26,668 in US

#50,126 in the World

Chicago, IL, United States of America

Learning Curve International Inc.

Forward Citations = 92

18 inventors:

Donald E Toht (9 out of 11 patents)

K Dale Weathington (4 out of 4 patents)

Richard Rothkopf (4 out of 4 patents)

4. Gary D Aigner (3 out of 7 patents)

5. Lisa Ellen Gelfond (2 out of 6 patents)

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