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:
Sep. 22, 1992
Filed:
Jul. 05, 1990
Tetsuhiko Hirata, Kawasaki, JP;
Kazuo Yagyu, Atsugi, JP;
Matsuaki Terada, Machida, JP;
Hiroshi Nakase, Fujisawa, JP;
Shigeru Oshima, Hadano, JP;
Motoyoshi Morito, Saitama, JP;
Takahiko Nishizawa, Satte, JP;
Hitachi, Ltd., Tokyo, JP;
Yagi Antenna Co., Ltd., Tokyo, JP;
Abstract
A base-band and broad-band coexisting communication system comprises a transmission path, a plurality of first data terminal units outputting data to be transmitted in the form of pulse signals (base band signals), a plurality of second data terminal units for outputting data to be transmitted in the form of modulated signals (broad band signals) each having a center frequency within a predetermined frequency range, and a plurality of low-pass filters, each connected to each of the first data transmission units, for cutting off high frequency components of the base band signal outputted by the first data terminal device at a predetermined cut-off frequency which does not overlap with the broad band signals.