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:
Feb. 02, 1988
Filed:
May. 30, 1985
Applicant:
Inventors:
Akinori Masuko, Fukaya, JP;
Akio Ogawa, Fukaya, JP;
Yasuhiro Muramatsu, Fukaya, JP;
Hideki Hirosawa, Fukaya, JP;
Robert M Rast, Englewood, CO (US);
W Sherwood Campbell, Littleton, CO (US);
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; H04H / ;
U.S. Cl.
CPC ...
358 86 ; 455-4 ; 455-5 ;
Abstract
A cable television system includes security means. A security sensor is provided a subscriber's house and when it generates an emergency signal a transmission path is formed by non-active elements from the security sensor to a trunk cable. An external control unit has a checking function of a power supplying state to the security sensor. The external control unit can communicate with a central station with respect to power source conditions of subscribers.