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. 29, 2003
Filed:
Jul. 25, 2002
Nobuhisa Motoyama, Tokai-mura, JP;
Hiromi Inaba, Hitachinaka, JP;
Atsushi Kawabata, Hitachi, JP;
Yoshinori Ohkura, Mito, JP;
Kenichi Yamashita, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An elevator system in which a car travels upward and downward among a plurality of floors includes an elevator control unit and terminals each having a wireless transmitting/receiving unit. The terminals are provided for the elevator control unit and for each of the floors. Transmitting/receiving of signals between two of the terminals distant from each other is effected so as to at least enable wireless bi-directional communication between the two of the terminals distant from each other by relaying signals through another wireless transmitting/receiving unit of another of the terminals.