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:
Dec. 11, 2001
Filed:
Sep. 29, 2000
Toshihide Maeda, Sagamihara, JP;
Nobuo Hamano, Tokyo, JP;
Shigeki Nakamura, Tokyo, JP;
Tomiharu Yoshida, Hitachinaka, JP;
Masataka Owada, Hitachi, JP;
Masahiko Ikeda, Hitachi, JP;
Takashi Yabutani, Hitachinaka, JP;
Masahiro Ito, Shimizu, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A communication system, wherein plural elliptical orbits in which an apogee is located on a specified service area are so defined that an individual right ascension of north-bound node may be established with a designated angle. A satellite is made to travel on an individual elliptical orbit and a group of satellites to be arranged on said elliptical orbits are used so that at least one of artificial satellites having a communication system may be always viewable within a pre-defined range of ascending vertical angle in a zenith direction from the service area.