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For the Inventor, By the Inventor

Holland, MI, United States of America

Dfk Inc.


USPTO Granted Patents = 3

Forward Citations = 41

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1 inventor (with patents filed for the assignee):

goldMedal James A Kammeraad (3 out of 26 patents)


3 patents:

1. 4156320 - Downrigger (1979-05-29),
2. D243177 - Trolling weight (1977-01-25),
3. 3968587 - Downrigger (1976-07-13),
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USPTO Data Jan 1 1976 - Oct 6 2026

3 Patents

#51 in Holland, MI

#2,493 in Michigan

#73,815 in US

Holland, MI (US)
Holland, MI, United States of America

Dfk Inc.

Forward Citations = 41

1 inventor:

goldMedal James A Kammeraad (3 out of 26 patents)

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