USPC 416/129

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USPC 416/129 is a patent subclass for devices with a source of mechanical power (an engine) rotating the plural impellers (maybe meaning propellers).[1]

References

This wiki has 12 patents in category "USPC 416/129".

Patents in category USPC 416/129

Enclosing categories USPC 416/128
Subcategories
Keywords Propellers
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