US PATENT SUBCLASS 278 / 80
.~ Ball and socket

Current as of: June, 1999
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278 /   HD   LAND VEHICLES: ANIMAL DRAFT APPLIANCES

52  DF  THILL COUPLINGS {10}
80.~ Ball and socket

DEFINITION

Classification: 278/80

Ball and socket:

(under subclass 52) Subject matter wherein one of the coupling elements is a ball and the other is a socket to receive the ball.