The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 22, 2003
Filed:
Mar. 22, 2001
SMK Corporation, Tokyo, JP;
Abstract
An inexpensive spread spectrum transmission system prevents the infiltration of external noise and external leakage of spread spectrum signals by separating electrical power for load devices from electrical power for communication. A plug socket for terminal connection receives a plug for terminal connection of a spread spectrum communication terminal apparatus. The plug for terminal connection is connected to the alternating current power supply line through a blocking filter which blocks electrical noise from entering the spread spectrum terminal apparatus, and prevent spread spectrum signals from passing in the reverse direction. Since the alternating current power supply line for communications carries only light loads, an inexpensive, low-capacity blocking filter is adequate as the blocking filter.