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:
May. 11, 1993
Filed:
May. 22, 1990
Applicant:
Inventors:
Toshiyuki Murakami, Hitachi, JP;
Sadao Mizokawa, Katsuta, JP;
Hisayuki Maruyama, Ebina, JP;
Masato Satake, Ibaraki, JP;
Masanori Kogawa, Hitachi, JP;
Naomasa Hanano, Ibaraki, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Cable Ltd., Tokyo, JP;
Hitachi Process Computer Engineering, Inc., Hitachi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
359178 ; 359174 ; 359135 ; 34082505 ; 3408255 ;
Abstract
A signal transmission system comprising an apparatus which inhibits the repeating in the opposite direction during reception and transmission of frames and which monitors the number of frames which were outputted in one direction from a repeater and the number of frames which were returned from such direction, whereby a destruction and circulation of the frame are inhibited without reducing response speed of a signal.