US PATENT SUBCLASS 313 / 336
.~ Point source cathodes

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

Internet Version by PATENTEC © 1999      Terms of Use


313 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES

326  DF  ELECTRODE AND SHIELD STRUCTURES {14}
336.~ Point source cathodes

DEFINITION

Classification: 313/336

(under subclass 326) Cathodes where the cathode is designed so that the electron emission from the cathode is restricted to a point-like area.

SEE OR SEARCH THIS CLASS, SUBCLASS:

364+, for cathode-ray tubes having point source cathodes.

SEE OR SEARCH CLASS

378, X-Ray or Gamma Ray Systems or Devices,

121+, for X-ray tubes having point source cathodes.