Patents by Inventor Cornelis Teunis Veenendaal

Cornelis Teunis Veenendaal 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).

  • Patent number: 4069453
    Abstract: A transistor test fixture for conducting reference and data measurements on transistors comprises rotatable disc means having short circuit means, through circuit means and data circuit means provided thereon. The rotatable disc means is positionable within a disc-receiving area of housing means having spaced coaxial means to provide signal input and output to the circuit means, and retaining and positioning means are provided by the rotatable disc means and the housing means to retain the disc means in the disc receiving area and to position the rotatable disc means in selected positions with the selected circuit means being in electrical connection with the coaxial means.
    Type: Grant
    Filed: February 23, 1977
    Date of Patent: January 17, 1978
    Assignee: Tektronix, Inc.
    Inventor: Cornelis Teunis Veenendaal
  • Patent number: 4063289
    Abstract: A cathode ray tube mounting means includes a front panel member having an opening through which a cathode ray tube is passed, and it has projections on its funnel section that mate with wedging members movably mounted in the panel member. A bezel having an implosion shield means therein is secured onto the front panel member and the wedging members are secured into position thereby moving the faceplate of the cathode ray tube into tight engagement with the implosion shield means. Lighting means is disposed between the front panel member and the bezel adjacent the faceplate to effectively light the graticule scale of the cathode ray tube screen and to permit easy replacement of light bulbs. A connecting means is also provided for electrically connecting a camera to the circuitry within the electronic instrument containing the cathode ray tube.
    Type: Grant
    Filed: November 18, 1976
    Date of Patent: December 13, 1977
    Assignee: Tektronix, Inc.
    Inventor: Cornelis Teunis Veenendaal
  • Patent number: 3984793
    Abstract: A continuously variable high frequency resistance attenuator is described in which the attenuation is first order independent of frequency. The wave translating media into and out of the attenuator provide a constant characteristic impedance. The attenuator consists of a length of series resistance and a plurality of parallel shunt resistors, which are of adjustable value and extend between the length of series resistance and ground or extend between the length of series resistance and open circuit.
    Type: Grant
    Filed: November 20, 1975
    Date of Patent: October 5, 1976
    Assignee: Tektronix, Inc.
    Inventors: David Arthur Hannaford, Cornelis Teunis Veenendaal, Valdis Egils Garuts