US PATENT SUBCLASS 708 / 540
.~.~.~ Cathode-ray tube

Current as of: June, 1999
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708 /   HD   ELECTRICAL COMPUTERS: ARITHMETIC PROCESSING AND CALCULATING

100  DF  ELECTRICAL DIGITAL CALCULATING COMPUTER {10}
200  DF  .~ Particular function performed {26}
490  DF  .~.~ Arithmetical operation {27}
540.~.~.~ Cathode-ray tube

DEFINITION

Classification: 708/540

Cathode-ray tube:

(under subclass 490) Subject matter wherein the specific apparatus for performing the arithmetic operation utilizes a cathode-ray tube.

SEE OR SEARCH CLASS

315, Electric Lamp and Discharge Devices: Systems,

1+, for cathode ray tube circuits in general.