Patent Yard Sign in
Expired Canadian patentCanada

Word synchronization system

CA 1329835 C · Owner: Nippon Telegraph & Telephone Corporation · Inventors: Aikawa, Satoru; Saito, Yoichi

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

This invention relates to a word synchronization system which receives signals with error correction codes to calculate a syndrome from an initial phase changes the, initial phase when the calculated syndrome is not zero to calculate it anew, and repeats the operation until the time when the particular syndrome becomes zero for the sequence of M time (or the number of testing stages). This invention system is further provided with a synchronization slip detecting circuit to judge such a slip out of the synchronization without the necessity to wait for the repetition of the state for M times to thereby enable prompt phase resetting or synchronization establishment. - Abstract -

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 May 24, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 10, 1989
GrantedMay 24, 1994
Term endedMay 24, 2011
Patent numberCA 1329835 C
Classification (IPC)H04L7/04

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedFeb 10, 1989Patent grantedMay 24, 1994Term endedMay 24, 2011

Sources & verification

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