US PATENT SUBCLASS 335 / 280
.~.~.~ Balls, filings or granular material

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

Internet Version by PATENTEC © 1999      Terms of Use


335 /   HD   ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS

209  DF  MAGNETS AND ELECTROMAGNETS {10}
220  DF  .~ With magneto-mechanical motive device (e.g., electromagnet with armature) {21}
279  DF  .~.~ Armature shape, structure or material {1}
280.~.~.~ Balls, filings or granular material

DEFINITION

Classification: 335/280

(under subclass 279) Subject matter wherein the significant armature structure comprises spherical balls or elements, metallic filings or fine granular material.