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:
Sep. 02, 2008
Filed:
Feb. 28, 2005
Applicants:
Katsuya Kitamori, Kawasaki, JP;
Nobuhiro Rikitake, Kawasaki, JP;
Inventors:
Katsuya Kitamori, Kawasaki, JP;
Nobuhiro Rikitake, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 31/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a state where although the setting of a line between a transmitting station and a receiving station is completed, no signal is transmitted, a test signal in a prescribed format is transmitted from the transmitting station. By transmitting the test signal, no signal disconnection is detected by each alarm detection point, and no alarm occurs. When a regular signal is transmitted from the transmitting station to the receiving station, the test signal is automatically switched to a regular signal on the transmitting station side.