US PATENT SUBCLASS 104 / 105
.~ Rigid frog

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

Internet Version by PATENTEC © 1999      Terms of Use


104 /   HD   RAILWAYS

96  DF  TROLLEY TRANSFER {9}
105.~ Rigid frog

DEFINITION

Classification: 104/105

(under subclass 96) Devices comprising fixed frogs having no movable parts.