US PATENT SUBCLASS 246 / 472
.~ Details

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


246 /   HD   RAILWAY SWITCHES AND SIGNALS

454  DF  CROSSINGS, FROGS, AND MATES {11}
472.~ Details

DEFINITION

Classification: 246/472

(under subclass 454) Subject matter having details relating to the construction of various types of crossings, frogs and mates.