US PATENT SUBCLASS 441 / 28
.~.~ Having ballast means

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

Internet Version by PATENTEC © 1999      Terms of Use


441 /   HD   BUOYS, RAFTS, AND AQUATIC DEVICES

1  DF  BUOY {6}
21  DF  .~ Having means to control attitude or position {3}
28.~.~ Having ballast means {1}
29  DF  .~.~.~> Variable ballast

DEFINITION

Classification: 441/28

Having ballast means:

(under subclass 21) Buoy wherein the means to control the vertical, horizontal, or rotational movement includes a heavy material intended to alter the draft or stability of the buoy.