US PATENT SUBCLASS 279 / 19.4
.~.~ Spreading elements
Current as of: June, 1999
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DEFINITION
Classification: 279/19.4
(under subclass 19) Devices in which two or more elements are
mounted for motion away from each other to release a tool from the socket and for motion toward each other to retain a tool in the socket.
SEE OR SEARCH THIS CLASS, SUBCLASS:
19.5, for single elements movable relative to the socket for retaining a tool in the socket.
