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. 14, 1976
Filed:
Jan. 31, 1975
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04Q / ;
U.S. Cl.
CPC ...
179 98 ; 179 / ;
Abstract
A multi-stage connection switch frame comprising crossbar switch lattices arrayed in at least three stages which are interconnected through links. Two adjacent stages of the multi-stage connection switch frame comprise a plurality of vertical groups each group comprising a plurality of upper part of verticals connected to each other by horizontals thereof in a multi-stage configuration and a plurality of lower part of corresponding verticals in all of the vertical groups being connected to each other by horizontals thereof in a multi-stage configuration, thereby to form the lattices in two stages which are coupled to each other through the verticals.