Patents by Inventor Gail Schjelderup

Gail Schjelderup 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).

  • Cellular digital packet data mobile data base station
    Patent number: 6122527
    Abstract: A cellular digital packet data (CDPD) system includes a mobile data base station (MDBS) configured to interface easily with an advanced mobile phone system (AMPS). The elements of the MDBS are arranged on modules and the functionality of the MDBS is divided among the modules to facilitate flexibility, compactness and quick expansion of the MDBS. To further facilitate compactness, the MDBS includes a transceiver/modem board which uses a single chip to carry out delta-sigma modulation. In order to maintain the integrity of CDPD transmission, a channel hopping scheme is used based upon avoidance of AMPS channel use. A distinctive protocol is used to encapsulate control/query/response data for transmission throughout the CDPD system. This protocol also facilitates easy control of each MDBS throughout the system.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: September 19, 2000
    Assignee: ADC Telecommuncations, Inc.
    Inventors: Mark T. Robinson, Steven H. Gardner, Matt Wong, Seton P. Kasmir, Kumar Balachandran, Sue Graham, Gail Schjelderup, Roy Franklin Quick, Jr.
  • Cellular digtial packet data mobile data base station
    Patent number: 5544222
    Abstract: A cellular digital packet data (CDPD) system includes a mobile data base station (MDBS) configured to interface easily with an advanced mobile phone system (AMPS). The elements of the MDBS are arranged on modules and the functionality of the MDBS is divided among the modules to facilitate flexibility, compactness and quick expansion of the MDBS. To further facilitate compactness, the MDBS includes a transceiver/modem board which uses a single chip to carry out delta-sigma modulation. In order to maintain the integrity of CDPD transmission, a channel hopping scheme is used based upon avoidance of AMPS channel use. A distinctive protocol is used to encapsulate control/query/response data for transmission throughout the CDPD system. This protocol also facilitates easy control of each MDBS throughout the system.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: August 6, 1996
    Assignee: Pacific Communication Sciences, Inc.
    Inventors: Mark T. Robinson, Steven H. Gardner, Matt Wong, Seton P. Kasmir, Kumar Balachandran, Sue Graham, Gail Schjelderup, Roy F. Quick, Jr.