Patents by Inventor Heinz-Peter Holzapfel

Heinz-Peter Holzapfel 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).

  • Modulo-2-adder for the logic-linking of three input signals
    Patent number: 4803649
    Abstract: Three-value modulo-2-adders consist of four circuit components (SC1, SC2, SC3, SC4) and an analysis circuit (AW). The first circuit component (SC1) generates an intermediate signal corresponding to the first binary value ("1") when two of the input signals (A, B, C) each assume the other binary value ("0"). The second circuit component (SC2) generates an intermediate signal (ZS2) corresponding to the other binary value when two input signals each assume the first binary value. The intermediate value emitted from the output of the third circuit component (SC3) is binary "0" when all three input signals assume the binary value "1". The fourth circuit component (SC4) emits the binary value "1" when all the input signals have the binary value "0".
    Type: Grant
    Filed: March 17, 1987
    Date of Patent: February 7, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventors: Heinz-Peter Holzapfel, Karlheinrich Horninger