US PATENT SUBCLASS 105 / 181
.~ Antifriction wheels

Current as of: June, 1999
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105 /   HD   RAILWAY ROLLING STOCK

157.1  DF  TRUCKS {27}
181.~ Antifriction wheels

DEFINITION

Classification: 105/181

(under subclass 157.1) Antifriction-wheels to carry the frame on the supporting wheels or axles.

(1) Note. The presence of mere rollers or ball-bearings in

the journal-boxes does not bring the patent to this subclass.