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Patent Drawing of Engine - Patent 1,012,087 - . Public domain  image

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Patent Drawing of Engine - Patent 1,012,087 - . Public domain image

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Summary

Steam shovel boom invention 1911

Public domain photograph of electrical equipment, power lines, engine, free to use, no copyright restrictions image - Picryl description

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Date

1911
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Source

USPTO
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Copyright info

public domain

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