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description

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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patent drawings steam shovels in the united states united states patent drawings inventions
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Date

1911
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Source

USPTO
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Link

https://www.uspto.gov/
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Copyright info

public domain

label_outline Explore Steam Shovels In The United States, United States Patent Drawings, Patent Drawings

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patent drawings steam shovels in the united states united states patent drawings inventions