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:
May. 13, 2003
Filed:
Jun. 15, 2000
Toshihiro Ishigaki, Kanagawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The clock system corrects the instant time using a signal transmitted from a stationary satellite. In the clock system, a high-frequency-signal transmitted from the stationary satellite is converted to an intermediate-frequency-signal by an analogue-signal-processing-circuit, then converted into a digital signal, and finally decoded to a digital signal by a digital-signal-processing-circuit. A CPU of the system calculates the stationary-satellite-time out of time data included in the signal transmitted, further the CPU converts it to a co-ordinated universal time (UTC). The clock system corrects the time of a clock circuit with the UTC and displays it on a display. As a result, a user of the system at a fixed point on Earth can always receive the time data from the same satellite, so that the clock system can keep time with high accuracy.