Patents by Inventor Dirk Hoffmeister

Dirk Hoffmeister 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).

  • GENE CLUSTER AND METHOD FOR THE BIOSYNTHESIS OF TERREQUINONE A
    Publication number: 20090011476
    Abstract: The present invention provides a novel gene cluster containing five genes (tdiA-E) involved in indole alkaloid synthesis. Disruption of tdiB, encoding an enzyme with prenyltransferase activity, transferring dimethylallylpyrophosphate to C-2 of an indole structure, eliminated the production of the antitumor compound terrequinone A, a metabolite not known from A. nidulans. The invention further provides a method for expressing terrequinone A in a host cell and isolating purified terrequinone A therefrom.
    Type: Application
    Filed: August 21, 2006
    Publication date: January 8, 2009
    Inventors: Dirk HOFFMEISTER, Nancy P. KELLER
  • Monolithic integrated selection circuit
    Patent number: 4215615
    Abstract: The circuit enables the selection of the upper or the lower tone of an electronic organ chord with regard to a switching signal. In response to said switching signal each tone frequency signal handled is either fed to the anode or the cathode of a switch component of a plurality of switch components connected in series whereas the switch components of the tone frequency signal not handled are switched on.
    Type: Grant
    Filed: March 12, 1979
    Date of Patent: August 5, 1980
    Assignee: ITT Industries, Incorporated
    Inventors: Dieter Holzmann, Dirk Hoffmeister
  • Method of generating a variable train of pulses
    Patent number: 4109210
    Abstract: The invention discloses a method and apparatus for digitally generating a variable pulse train with some pulses in a period T, the number of which can be changed step by step. The pulse train can be used for generating a variable dc voltage particularly for the tuning voltage of TV receiver capacitance diodes.
    Type: Grant
    Filed: February 9, 1977
    Date of Patent: August 22, 1978
    Assignee: ITT Industries, Incorporated
    Inventors: Albrecht Gerlach, Dieter Holzmann, Daniel Mlynek, Dirk Hoffmeister