Cite Filings / PRLB / 0001193125-12-078638

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424B4

Prospectus

Proto Labs Inc Filed 2012-02-27 Acc 0001193125-12-078638

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424B4 Prospectus , d199869d424b4.htm

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2012-02-27 4 Changes in Ownership
2012-02-27 4 Changes in Ownership
2012-02-27 4 Changes in Ownership
2012-02-27 4 Changes in Ownership
2012-02-27 4 Changes in Ownership
2012-02-27 4 Changes in Ownership
2012-02-27 424B4 Prospectus

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