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. 20, 2004
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 terminal for communicating through an artificial satellite, wherein the artificial satellite is placed into an orbit in which an individual satellite orbits on an elliptical orbit so that at least one of the artificial satellites is always viewable within a pre-defined range of operational elevational angle in a zenith direction from a service area. A group of the artificial satellites are satellites on respective orbits obtained by combining an inclination angle and an eccentricity squared of said elliptical orbit so that a time period during which an artificial satellite is viewable from ground is substantially identical and the communication terminal has a transmitter and receiver for transmitting and receiving a signal through the group of artificial satellites.