Patents by Inventor Manfred Koslar

Manfred Koslar 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).

  • Test device for indicating an electric voltage and/or the polarity thereof, and the passage of current through an electric conductor
    Patent number: 4210862
    Abstract: A test device for determining the voltage and/or polarity thereof and the amount of current passing through an electric conductor has two pencil-like probes with electrical contact tips electrically connected together through a plurality of circuit elements. At least one probe has a hollow handle portion in which there is mounted a ceramic cold current limiting resistor connected to the contact tip of one of said probes, a pair of luminescent diodes connected as an antiparallel circuit to the resistor, a keying switch having a movable contact and a first and a second stationary contact. The movable switch contact is connected to the opposite end of the antiparallel diode circuit from the resistor. One stationary contact of the switch is connected to the contact tip of the second probe, while the other stationary contact is connected to the second probe tip through a battery and a protective diode.
    Type: Grant
    Filed: April 13, 1978
    Date of Patent: July 1, 1980
    Assignee: Siemens Aktiengesellschaft
    Inventor: Manfred Koslar
  • Electrical testing instrument
    Patent number: D260619
    Type: Grant
    Filed: May 8, 1979
    Date of Patent: September 8, 1981
    Inventor: Manfred Koslar