Patents by Inventor Onno M. Prinsze

Onno M. Prinsze 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 flashlight combined with a constant current battery charging circuit
    Patent number: 4398139
    Abstract: Apparatus for charging rechargeable batteries includes a constant current regulator connected in combination with a current limiting resistor to provide constant current for charging the rechargeable battery and a pair of light emitting diodes are used to indicate the charging status of the rechargeable battery.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: August 9, 1983
    Inventor: Onno M. Prinsze
  • Multiple constant current battery charging apparatus
    Patent number: 4350946
    Abstract: An array of low wattage low voltage current regulators is used to provide a multiple of regulated constant currents for charging a variable number of rechargeable batteries from a given power source voltage at any of a plurality of settings by changing the current capacity. Visual indications of the current settings are also provided.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: September 21, 1982
    Inventor: Onno M. Prinsze
  • Energizer apparatus for rechargeable flashlight batteries
    Patent number: 4092580
    Abstract: Energizer apparatus is disclosed for recharging flashlight batteries maintained within the flashlight utilizing the flashlight bulb as a control element and a special adapter cap for the flashlight casing which is substituted for the standard rear end cap of a conventional flashlight to enable the flashlight batteries to be charged in place within the flashlight.
    Type: Grant
    Filed: September 27, 1976
    Date of Patent: May 30, 1978
    Inventor: Onno M. Prinsze