USPC 244/61

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Power plant using airship gas as fuel:
This subclass is indented under subclass 53. Aircraft power plants adapted to use some part of the sustaining gas or some other gas peculiarly adapted for airship use as fuel.

Patents in category USPC 244/61
Enclosing categories USPC 244/53R
Subcategories
Keywords USPC 244/30, LTA, Propulsion
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