Patents by Inventor Matti Naskali

Matti Naskali 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).

  • Method for fast charging of different types of batteries
    Patent number: 5625274
    Abstract: The invention relates to a method for terminating the charging of a battery, in which a certain decrease in the battery voltage is detected when the battery is fully charged and the charge begins to decrease. With the invention it is possible to prevent battery overcharge reliably and efficiently. The solution can be applied to the charging of both Ni--Cd and Ni--MH batteries with a same charger and/or same charge control program.
    Type: Grant
    Filed: November 8, 1995
    Date of Patent: April 29, 1997
    Assignee: Nokia Mobile Phones Limited
    Inventor: Matti Naskali
  • Fast charging arrangement
    Patent number: 5446364
    Abstract: In a fast charging arrangement between a charger (20) and a battery-powered device (20) the charging current of the battery (36) is controlled with a logic arrangement (38) as a function of the charging state and/or temperature of the battery. According to the invention, the connection (10, 12) between the charger (10) and the battery-powered device (30) is bipolar, the logic arrangement (38) having been disposed in the battery-powered device (30), advantageously in a mobile telephone.
    Type: Grant
    Filed: February 14, 1992
    Date of Patent: August 29, 1995
    Assignee: Nokia Mobile Phones Ltd.
    Inventor: Matti Naskali
  • Battery
    Patent number: D423449
    Type: Grant
    Filed: August 6, 1999
    Date of Patent: April 25, 2000
    Assignee: Nokia Nobile Phones Limited
    Inventor: Matti Naskali