US PATENT SUBCLASS 379 / 56.3
.~ Including infra-red link with landline telephone network

Current as of: June, 1999
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379 /   HD   TELEPHONIC COMMUNICATIONS

56.1  DF  HAVING LIGHT WAVE OR ULTRASONIC LINK FOR SPEECH OR PAGING SIGNAL {2}
56.3.~ Including infra-red link with landline telephone network

DEFINITION

Classification: 379/56.3

Including infra-red link with landline telephone network:

(under subclass 56.1) Subject matter wherein the electromagnetic wave is in a range of radiation wavelengths invisible to the human eye lying between 750 nanometers and about 1 millimeter.