US PATENT SUBCLASS 420 / 494
.~ Beryllium, magnesium, or alkaline earth metal containing

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

Internet Version by PATENTEC © 1999      Terms of Use


420 /   HD   ALLOYS OR METALLIC COMPOSITIONS

469  DF  COPPER BASE {15}
494.~ Beryllium, magnesium, or alkaline earth metal containing

DEFINITION

Classification: 420/494

Beryllium, magnesium or alkaline earth metal containing:

(under subclass 469) Alloy, or metallic composition which additionally contains at least one of the metals beryllium, magnesium, calcium, strontium, or barium.