US PATENT SUBCLASS 365 / 146
.~ Electrets


Current as of: June, 1999
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365 /   HD   STATIC INFORMATION STORAGE AND RETRIEVAL

129  DF  SYSTEMS USING PARTICULAR ELEMENT {26}
146.~ Electrets


DEFINITION

Classification: 365/146

Electrets:

(under subclass 129) Subject matter in which the storage medium is an electret, that is, an element which exhibits a permanent external electrostatic field due to internal polarization.

SEE OR SEARCH THIS CLASS, SUBCLASS:

145, for ferroelectric storage systems.

147, for persistent internal polarization devices.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems,

400, for electrets used in saturable reactor systems.