Ringgenberg, Dirk D.
United States of America
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| Total IP | 1 |
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| Total IP Rank # | 1,335,089 |
| IP Activity Score | 0/5.0 0 |
| IP Activity Rank # | 1,780,630 |
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| Last Patent | 2015 - Apparatus for prevention of drop... | |||||||||||||||
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| First Patent | 2014 - Apparatus for prevention of drop... | |||||||||||||||
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