×

Telephone hand-free apparatus

  • US 6,216,018 B1
  • Filed: 08/05/1998
  • Issued: 04/10/2001
  • Est. Priority Date: 08/06/1997
  • Status: Expired due to Fees
First Claim
Patent Images

1. A telephone hand-free apparatus for use with a portable telephone which has a microphone and a speaker installed therein, said hand-free apparatus comprising:

  • a cylindrical can;

    a telephone receiving case installed in said cylindrical can, said telephone receiving case being so sized and constructed as to receive therein said portable telephone;

    a board on which a control circuit is arranged, said board being installed in said cylindrical can;

    an external microphone operatively connected to said control circuit and exposed to the outside of said cylindrical can;

    an external speaker operatively connected to said control circuit and installed in said cylindrical can;

    a connection cable means extending from said control circuit, so that when said connection cable means is connected to a socket means of said portable telephone, said external microphone and said external speaker become operative in place of the microphone and the speaker of said portable telephone; and

    an electric power source which energizes said control circuit, wherein said control circuit includes a muting section which makes said external microphone inoperative while said control circuit is receiving a voice signal from said portable telephone through said connection cable means.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×