U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Multiple smart card phone and method

Patent 5987325 Issued on November 16, 1999. Estimated Expiration Date: Icon_subject May 19, 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.

Patent References

Bulletin board resource for communication system access
Patent #: 5301359
Issued on: 04/05/1994
Inventor: Van den Heuvel, et al.

Contacting device for standard chip card and SIM card
Patent #: 5336877
Issued on: 08/09/1994
Inventor: Raab, et al.

Radio having memory means for storing radio user validation code
Patent #: 5404580
Issued on: 04/04/1995
Inventor: Simpson, et al.

Automatic number assignment module selection for mobile telephone
Patent #: 5428666
Issued on: 06/27/1995
Inventor: Fyfe, et al.

Wireless terminal having digital radio processing with automatic communication system selection capability
Patent #: 5655003
Issued on: 08/05/1997
Inventor: Erving, et al.

Radiotelephone having a plurality of subscriber identities and method for operating the same Patent #: 5764730
Issued on: 06/09/1998
Inventor: Rabe, et al.

Inventor

Assignee

Application

No. 858619 filed on 05/19/1997

US Classes:

455/435.2, System selection379/357.01, Insertable control element or circuitry (e.g., card)455/558Card control element

Examiners

Primary: To, Doris H.

Attorney, Agent or Firm

Foreign Patent References

  • 0 556 970 A1 EP. 08/13/1993
  • 2 269 512 GB. 09/13/1994
  • 2 299 192 GB. 09/13/1996

International Class

H04B 001/33

Abstract

A telephone, such as a radiotelephone, is provided having the capability to concurrently operate with two subscriber identification module (SIM) cards. The telephone advantageously permits a single phone to have two telephone numbers associated therewith.

Other References

  • PCT WO 92/19078 Julin, Aug. 1992
  • PCT WO 94/08433 Ab Nordictel, Apr. 199
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