Double sided keyboard for a telephone

Patent 6038313 Issued on March 14, 2000. Estimated Expiration Date:

November 20, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Portable personal computer and mobile telephone device
Patent #: 5189632
Issued on: 02/23/1993
Inventor: Paajanen, et al.

Portable radio apparatus with a folding structure
Patent #: 5564078
Issued on: 10/08/1996
Inventor: Nagai, ;, , , --> Nagai

Communication device having a movable front cover for exposing a touch sensitive display
Patent #: 5584054
Issued on: 12/10/1996
Inventor: Tyneski, et al.

Method and apparatus for generating gift certificates
Patent #: 5652421
Issued on: 07/29/1997
Inventor: Veeneman, et al.

Apparatus for controlling the impedance of high speed signals on a printed circuit board
Patent #: 5764489
Issued on: 06/09/1998
Inventor: Leigh, et al.

Automated retrieval of voice mail using speech recognition Patent #: 5822405
Issued on: 10/13/1998
Inventor: Astarabadi

Inventor

Collins, Hugh Mark A.

Assignee

Nortel Networks Corporation

Application

No. 974875 filed on 11/20/1997

US Classes:

379/433.07Keypad

Examiners

Primary: Chiang, Jack

Foreign Patent References

0164743 JP 07/12/1988
2146813A GB. 04/12/1985

International Class

H04M 001/00

Abstract

A portable telephone has a hinged flap with a keyboard on each side of the flap, allowing a user to dial or punch a telephone number when the flap is in the open position or when the flap is in the closed position.