Patent Yard Sign in
Expired Canadian patentCanada

Error-rejecting data transmission system

CA 1109964 A · Owner: Caterpillar Tractor Co. · Inventors: Robinson, Tommy E.; Miller, Robert G.; Huxtable, James T.

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, A system for transmitting binary-bit words from a sending station to a receiving station wherein each word has the same number N of binary bits and wherein each different word has the same number M of binary l's and the same number (N-M) of binary O's as every other word but in a different arrangement. The number of binary l's in each word received is counted, and if such count is not exactly equal to M the, word i s rejected as inaccurately received. -1-

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 September 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 29, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 3, 1978
GrantedSeptember 29, 1981
Term endedSeptember 29, 1998
Patent numberCA 1109964 A
Classification (IPC)H03M13/51

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedMay 3, 1978Patent grantedSep 29, 1981Term endedSep 29, 1998

Sources & verification

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