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:
Jun. 23, 1987
Filed:
Dec. 28, 1984
Takuo Ishizuka, Hadano, JP;
Masao Kato, Hadano, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a loop network system in which a plurality of nodes are connected in the form of a loop, and a token frame is transmitted to shift the data transmit right among the nodes, the token frame transmitted from a node includes information for reserving the data transmit right of its own node even after allocation of the data transmit right to another node, so that a full duplex communication linkage can be established between the node having acquired the data transmit right by receiving the token frame and the node having transmitted the token frame. The token frame further includes a level mask field specifying the data transmit right allocation level so that the data transmit right is shifted according to the allocation level.