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For the Inventor, By the Inventor

Downers Grove, IL, United States of America

Abc-naco Inc.


USPTO Granted Patents = 2


Forward Citations = 15

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2 inventors (with patents filed for the assignee):

goldMedal Stephen R Kuhn (2 out of 17 patents)

silverMedal Keith Young (2 out of 14 patents)


2 patents:

1. 6286791 - Railroad spring wing frog with hold-open and shock dampening elements (2001-09-11),
2. 6276642 - Railroad spring wing frog assembly (2001-08-21),
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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#39 in Downers Grove, IL

#4,306 in Illinois

#92,587 in US

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Downers Grove, IL, United States of America

Abc-naco Inc.

Forward Citations = 15

2 inventors:

goldMedal Stephen R Kuhn (2 out of 17 patents)

silverMedal Keith Young (2 out of 14 patents)

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