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:
Oct. 15, 1991
Filed:
May. 24, 1989
Yasuhiro Ishii, Tokyo, JP;
Tetsuji Isogai, Tokyo, JP;
Tatsuhiko Okazaki, Tokyo, JP;
Fumikazu Sato, Tokyo, JP;
Hiroto Yoneyama, Tokyo, JP;
Yukio Inotsume, Tokyo, JP;
Toshiyuki Kodama, Tokyo, JP;
Abstract
A mobile telecommuncations system has multiple base stations each defining a miniature service zone and capable of communicating with mobile stations present in the service zone over a radio link. Geographically associated ones of the base stations are spaced apart from each other by an area which is not responsive to electromagnetic waves on the radio links, whereby the base stations are allowed to share the same frequency for the electromagnetic waves. The base stations are interconnected to an on-road vehicle telecommunications network which switches communications to the base stations.