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:
Jan. 13, 2004
Filed:
Aug. 25, 1999
Applicant:
Inventor:
Hideki Sugiyama, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/100 ; G08C 2/500 ; H03M 1/300 ; H04L 1/00 ;
U.S. Cl.
CPC ...
G06F 1/100 ; G08C 2/500 ; H03M 1/300 ; H04L 1/00 ;
Abstract
It is an object to allow an output apparatus to certainly recognize an error when the error occurs at the time of a data transfer using an upper layer (IEEE 1284.4). In a communication system in which an information processing apparatus and an output apparatus can communicate data by using an interface constructed by the upper layer (IEEE 1284.4) and a lower layer (IEEE 1284), when the information processing apparatus detects an error at the time of a data communication using the upper layer, a, predetermined command (device ID request) specified in the lower layer is used in order to allow the output apparatus to recognize the occurrence of the error.