US PATENT SUBCLASS 446 / 68
.~.~ Having ballast feature
Current as of:
June, 1999
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446 /
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AMUSEMENT DEVICES: TOYS
34
DF
AERODYNAMICALLY SUPPORTED OR RETARDED
{8}
61
DF
.~ Glider {5}
68
.~.~ Having ballast feature
DEFINITION
Classification: 446/68
Having ballast feature:
(under subclass 61) Device including a discrete mass or high density portion which improves stability or control of the device while in flight.