Patents by Inventor Nils R. C. Rybeck

Nils R. C. Rybeck 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).

  • Rechargeable battery pack with identification circuit, real time clock and authentication capability
    Patent number: 5608306
    Abstract: An apparatus is provided for identifying an individual battery pack includes at least one resistor having a particular resistance value and a supervising unit for reading the particular resistance value of the at least one resistor to determine the individual identity of the battery. A clock is provided which is used to determine the remaining useful life of the battery. Recharging is selectively allowed or prevented, depending on the identify and the remaining useful life. Additionally, the authenticity of the battery pack can be verified by using a random number used as a variable in a mathematical formula stored in the application circuit and the battery and comparing the result of the calculation.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: March 4, 1997
    Assignee: Ericsson Inc.
    Inventors: Nils R. C. Rybeck, Magnus Hansson, Peter Holmqvist