Patent drawing - US1420665 - . Public domain image

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Patent drawing - US1420665 - . Public domain image

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Summary

Patent US1420665, vacuum cleaner with separator without water
Deutsch: Patent US1420665, Staubsauger mit Separator ohne Wasser

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Date

27/06/1922
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Source

USPTO
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Link

http://uspto.gov/
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public domain

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