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For the Inventor, By the Inventor

Harrison, AR, United States of America

Ducan Industries Parking Control Corp.


USPTO Granted Patents = 1

Forward Citations = 5

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2 inventors (with patents filed for the assignee):

goldMedal Ralph H Carmen (1 out of 16 patents)

silverMedal John W Van Horn (1 out of 8 patents)


1 patent:

1. 5139128 - Chute for controlling the motion of a token moving by gravity through a (1992-08-18),
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USPTO Data Jan 1 1976 - Dec 30 2025

1 Patents

#4 in Harrison, AR

#334 in Arkansas

#133,891 in US

...
Harrison, AR, United States of America

Ducan Industries Parking Control Corp.

Forward Citations = 5

2 inventors:

goldMedal Ralph H Carmen (1 out of 16 patents)

silverMedal John W Van Horn (1 out of 8 patents)

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