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. 08, 2014
Filed:
Feb. 02, 2011
Takamasa Kawaguchi, Yokohama, JP;
Tomoichi Ebata, Machida, JP;
Takayoshi Fujioka, Narashino, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention provides a positional information transmitter, a positional information receiver and a position measuring system capable of measuring a position under moving circumstances. The positional information transmitter transmits positional information for specifying the current position. The positional information transmitter comprises a memory unit which stores therein a plurality of first positional information indicative of the latitude of the current position and a plurality of second positional information indicative of the longitude of the current position, a transmission unit which generates a first positional information signal corresponding to a wireless signal including the first positional information stored in the memory unit and a second positional information signal corresponding to a wireless signal including the second positional information stored therein, and transmits the generated first and second positional information signals, and a timing controller which controls the transmission unit in such a manner that the transmission unit repeatedly transmits the first positional information signal in different periods and repeatedly transmits the second positional information signal in different periods.