CPC B64B1/30

From Inventing aviation
Jump to navigation Jump to search

CPC B64B1/30 is a patent class for Arrangements of propellers on semi-rigid lighter-than-air craft.[1][2]

Patent class tree:

References

This wiki has 8 patents in category "CPC B64B1/30".

Patents in category CPC B64B1/30

Enclosing categories CPC B64B1/00
Subcategories
Keywords
Start year
End year