×

Telephone handset for mixed-mode voice-and-TDD communication

  • US 6,668,042 B2
  • Filed: 01/24/2001
  • Issued: 12/23/2003
  • Est. Priority Date: 01/24/2001
  • Status: Expired due to Fees
First Claim
Patent Images

1. A telephone handset comprising:

  • an earpiece; and

    a mouthpiece detachably attached to the earpiece, allowing one of the earpiece and the mouthpiece when detached to be used by a human user for listening or talking, respectively, on a telephone call while simultaneously allowing the other of the earpiece and the mouthpiece to be used for receiving or transmitting, respectively, data with an acoustic coupler.

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