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. 18, 1992
Filed:
May. 01, 1989
Toshifumi Yamamoto, Hitachi, JP;
Mitsuro Takakura, Katsuta, JP;
Hiromasa Yamaoka, Hitachi, JP;
Masakazu Okada, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A method and apparatus for transmission of data among computers or peripherals along a loop transmission line includes a master system which provides signals along the transmission line for establishing a series of data frames of equivalent length. Each data frame is assigned a frame number, and is allotted a preselected amount of available space for placement of data. Subsequent computers or peripherals are preprogramed with a series of frame numbers which identify those data frames into which they may write data, or from which data is to be read. The allotment of preselected frame numbers for placement and reception of data by the respective devices provides for equivalent sharing of the available data transmission capability of the loop transmission system.