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Marshalltown
MA
Marshalltown
— 1 Patent in 2021
Rank
(2021):
#24,955
of
31,506
Top 80%
2
inventors
1
Patents 2021
Top Inventors at Marshalltown
2021
Showing
1–2
of
2
inventors
Rank
Name
Patents
1
Charles Henry Cowie
1
1
Michael Shane Grigg
1
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