Patents by Inventor Russell P. Cashman

Russell P. Cashman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Portable communications and data terminal operating to optimize receipt of both incoming CDPD and AMPS messages
    Patent number: 6850774
    Abstract: A portable radio telephone handset operates as a data transfer terminal as well as an analog cellular telephone subscriber station. Two modes of operation, an analog cellular communication mode and a Cellular Digital Packet Data (CDPD) mode, are available in the handset. The handset distinguishes between paging signals indicating CDPD mode communications and those indicating analog cellular communications. The handset also automatically preempts CDPD communications in favor of analog cellular communications such as those carried out in an AMPS configuration. The handset maintains an active status on a CDPD communication channel during a “sleep mode”, when the handset can carry out AMPS activity.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: February 1, 2005
    Assignee: Cirrus Logic, Inc.
    Inventor: Russell P. Cashman
  • Method and apparatus for concurrent monitoring of divergent wireless telecommunication systems
    Patent number: 6826400
    Abstract: A portable communications subscriber unit operates as a data transfer terminal as well as an analog cellular telephone M-ES. Two modes of operation, an analog cellular communication mode and a Cellular Digital Packet Data (CDPD) mode, are available in the subscriber unit. The subscriber unit distinguishes between paging signals indicative of a CDPD mode of communication and those indicative of an analog cellular mode of communication. The subscriber unit automatically preempts CDPD communications in favor of analog cellular communications such as those carried out in an AMPS system. The present inventive method enables the subscriber unit to remain registered in the CDPD communication system using a CDPD “sleep mode” while performing activities on the AMPS system. Another aspect of the present invention facilitates the automatic switching of subscriber unit displays to correspond to the communication system with which the unit is presently communicating.
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: November 30, 2004
    Assignee: Pacific Communication Sciences, Inc.
    Inventors: Russell P. Cashman, Richard A. Schwartz
  • Method in a portable communications and data terminal operating to optimize receipt of both incoming CDPD and AMPS messages
    Patent number: 6449494
    Abstract: A portable radio telephone handset operates as a data transfer terminal as well as an analog cellular telephone subscriber station. Two modes of operation, an analog cellular communication mode and a Cellular Digital Packet Data (CDPD) mode, are available in the handset. The handset distinguishes between paging signals indicating CDPD mode communications and those indicating analog cellular communications. The handset also automatically preempts CDPD communications in favor of analog cellular communications such as those carried out in an AMPS configuration. The handset maintains an active status on a CDPD communication channel during a “sleep mode”, when the handset can carry out AMPS activity.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: September 10, 2002
    Assignee: Cirrus Logic, Inc.
    Inventor: Russell P. Cashman
  • Portable communications and data terminal operating to optimize receipt of both incoming CDPD and AMPS messages
    Patent number: 6334062
    Abstract: A portable radio telephone handset operates as a data transfer terminal as well as an analog cellular telephone subscriber station. Two modes of operation, an analog cellular communication mode and a Cellular Digital Packet Data (CDPD) mode, are available in the handset. The handset distinguishes between paging signals indicating CDPD mode communications and those indicating analog cellular communications. The handset also automatically preempts CDPD communications in favor of analog cellular communications such as those carried out in an AMPS configuration. The handset maintains an active status on a CDPD communication channel during a “sleep mode”, when the handset can carry out AMPS activity.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 25, 2001
    Assignee: Cirrus Logic, Inc.
    Inventor: Russell P. Cashman
  • Portable communications and data terminal operating to optimize receipt of both incoming CDPD and AMPS messages
    Patent number: 6157836
    Abstract: A portable radio telephone handset operates as a data transfer terminal as well as an analog cellular telephone subscriber station. Two modes of operation, an analog cellular communication mode and a Cellular Digital Packet Data (CDPD) mode, are available in the handset. The handset distinguishes between paging signals indicating CDPD mode communications and those indicating analog cellular communications. The handset also automatically preempts CDPD communications in favor of analog cellular communications such as those carried out in an AMPS configuration. The handset maintains an active status on a CDPD communication channel during a "sleep mode", when the handset can carry out AMPS activity.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: December 5, 2000
    Assignee: Pacific Communication Sciences, Inc.
    Inventor: Russell P. Cashman
  • Portable communications and data terminal operating to optimize receipt of both incoming CDPD and AMPS messages
    Patent number: 5819184
    Abstract: A portable radio telephone handset operates as a data transfer terminal as well as an analog cellular telephone subscriber station. Two modes of operation, an analog cellular communication mode and a Cellular Digital Packet Data (CDPD) mode, are available in the handset. The handset distinguishes between paging signals indicating CDPD mode communications and those indicating analog cellular communications. The handset also automatically preempts CDPD communications in favor of analog cellular communications such as those carried out in an AMPS configuration. The handset maintains an active status on a CDPD communication channel during a "sleep mode", when the handset can carry out AMPS activity.
    Type: Grant
    Filed: June 28, 1995
    Date of Patent: October 6, 1998
    Assignee: Pacific Communication Sciences, Inc.
    Inventor: Russell P. Cashman