Patent Yard Sign in
Expired Canadian patentCanada

Bus control gate array

CA 1252575 A · Owner: Data General Corporation · Inventors: Arima, Shigemi; Wadano, Yoshihiko; Miyashita, Kazuhiro

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

Abstract of the Disclosure, In a computer having a central processing unit (CPU), a common bus, a plurality of input and output devices which are connected to the common bus and which have an intrinsic I/O device address, individually and, a bus control gate array, the bus control gate array according to the present invention includes an I/O device address decoder. The I/O device address decoder comprises a plurality of gates and decodes an I/O device address supplied from the CPU to produce a control signal for selecting the designated I/O device thereto.

Read the whole patent

Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted April 11, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 11, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 13, 1985
GrantedApril 11, 1989
Term endedApril 11, 2006
Patent numberCA 1252575 A
Classification (IPC)G06F12/06

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedJune 13, 1985Patent grantedApril 11, 1989Term endedApril 11, 2006

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.