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For the Inventor, By the Inventor

Cincinnati, OH, United States of America

Helmsderfer; John A.


USPTO Granted Patents = 3

Forward Citations = 43

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2 inventors (with patents filed for the assignee):

goldMedal John A Helmsderfer (3 out of 54 patents)

silverMedal David Memke (3 out of 6 patents)


3 patents:

1. D416155 - Portion of a base for a baby diaper changing station (1999-11-09),
2. D412634 - Baby diaper changing station (1999-08-10),
3. D408190 - Platform for a baby diaper changing station (1999-04-20),
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USPTO Data Jan 1 1976 - Dec 30 2025

3 Patents

#267 in Cincinnati, OH

#2,785 in Ohio

#72,042 in US

...
Cincinnati, OH, United States of America

Helmsderfer; John A.

Forward Citations = 43

2 inventors:

goldMedal John A Helmsderfer (3 out of 54 patents)

silverMedal David Memke (3 out of 6 patents)

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