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. 28, 1999
Filed:
Apr. 19, 1995
Hiroki Horikoshi, Kawasaki, JP;
Masanori Kawashima, Yokosuka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In a communication system having a plurality of communication terminals connected by a communication circuit in the form of a loop or a bus, data circulated through the communication circuit has a multi-frame structure having a multiplicity of frames in which data fields are assigned to the terminals, and the circulated data is relayed and updated. If all data generated by the terminals is circulated through the communication circuit, each terminal may receive data generated from itself, which is essentially meaningless for the terminal. Data which has become essentially meaningless is deleted during communication to prevent such meaningless data from always occupying a part of the communication circuit to reduce the communication speed and the efficiency of utilization of the communication circuit.