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:
Nov. 20, 1990
Filed:
Feb. 01, 1989
Yasunao Go, Kawagoe, JP;
Chiaki Hirano, Kawagoe, JP;
Shigeto Mori, Kawagoe, JP;
Masanori Kurosaki, Kawagoe, JP;
Akira Hayama, Kawagoe, JP;
Youichi Yamazaki, Kawagoe, JP;
Toshiyuki Kimura, Kawagoe, JP;
Yoshio Aoyagi, Kawagoe, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A polling system for use in an audio system in which a plurality of controllers for controlling a plurality of input/output devices of the audio system and a system controller for controlling the status of the plurality of controllers are connected via a bus line. In an initial polling operation upon power-up of the system, the system controller in order confirms the connection of the plurality of controllers to the system and stores the results of confirmation. When the absence of connection of the controllers is confirmed in the initial polling operation, the system controller further monitors the level on a transmission line provided in the bus line for transmitting a requesting signal from the plurality of controllers to the system controller, and performs the polling operation once more if the presence of the requesting signal is confirmed.