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Patent Drawing of Engine - US4013048 fig1-Color - Public domain portrait drawing Public domain image

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Summary

drawing from the Expired patent US4013048

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patents patent drawings us patent office bourke engine inventions
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Date

12/12/1975
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Source

USPTO
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Link

http://uspto.gov/
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Copyright info

public domain

label_outline Explore Bourke Engine

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patents patent drawings us patent office bourke engine inventions