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:
Nov. 29, 1994
Filed:
Mar. 27, 1992
Naoki Hirasawa, Tokyo, JP;
Shinichi Kobayashi, Saitama, JP;
NEC Corporation, Tokyo, JP;
Abstract
A car telephone is disclosed that is included in a car telephone system and selectively operable in a car-mounted mode or in a portable mode. A portable unit and a telephone antenna constitute a mobile car telephone set, while a car antenna, a power amplifier unit, a curled cord, and a connection unit constitute a car-mounted telephone together with the portable unit. The car telephone operates in a unique manner in a car-mounted mode. The power amplifier unit converts a received signal from a base station included in the system to an intermediate frequency (IF) signal by a receiving mixer and feeds the IF signal to the curled cord. The IF signal is transferred to a demodulator included in the portable unit over a coaxial cable incorporated in the curled cord and the connection unit. Therefore, the transmission loss of the signal to the portable unit particular to the coaxial cable is noticeably reduced, whereby the constants of the circuits included in the car telephone can be selected with unprecedented freedom.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile