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:
Dec. 12, 1989
Filed:
Jun. 17, 1988
Applicant:
Inventor:
Yutaka Hirasawa, Kokubunji, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J / ; H04Q / ;
U.S. Cl.
CPC ...
340825030 ; 340825520 ; 340825500 ; 340825510 ; 364200 ; 364240 ; 370 851 ; 370 93 ;
Abstract
A LAN system comprises LAN controllers provided for computer systems that constitute a multi-computer system. Each LAN controller has a memory section in which a LAN address common to the multi-computer system is set in accordance with a command from a master computer of the computer systems, and a register section for holding a reception permit command (flag) from the master computer system. Only when the reception permit command is held in the register section, a transmission frame whose destination address is the LAN address held in the memory section is selectively received from a LAN and transferred to the master computer system.