US PATENT SUBCLASS 148 / 909
.~ Tube


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

Internet Version by PATENTEC © 1999      Terms of Use



148 /   HD   METAL TREATMENT

902  DF  HAVING PORTIONS OF DIFFERING METALLURGICAL PROPERTIES OR CHARACTERISTICS {8}
909.~ Tube


DEFINITION

Classification: 148/909

Tube:

(under subclass 902) Art collection wherein the stock material is tubular.

(1) Note. This subclass is not limited to tubular conduits, e.g., steam pipe, but also includes hollow tubular articles, e.g., internal combustion engine wrist pins, etc.