Patent Yard Sign in
Expired Canadian patentCanada

Distributed push-pull amplifier

CA 1283713 C · Owner: Gruchalla, Michael Emeric · Inventors: Gruchalla, Michael Emeric; Koller, David Christ

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

The present invention provides a modified distributed amplifier which is capable of providing push-pull operation without the loading losses of conventional push-pull combining. The modified distributed amplifier comprises a distributed amplifier configuration and with signal inverting means such as a wide bandwidth transmission, line transformer interconnected into both the input and output lines. The signal inverting means are most effectively placed at the electrical centers of the lines but may, be placed at any positions in the individual lines to produce optimum performance to specific applications. The separate segments of the distributed amplifier separated by the signal inverting …

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 30, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 30, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 13, 1989
GrantedApril 30, 1991
Term endedApril 30, 2008
Patent numberCA 1283713 C
Classification (IPC)H03F3/60

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedMarch 13, 1989Patent grantedApril 30, 1991Term endedApril 30, 2008

Sources & verification

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