Patents by Inventor Nico Valentinus Franssen

Nico Valentinus Franssen 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: 4086431
    Abstract: System for the vocoder transmission of speech signal with reduced bandwidth. The speech signal is split into a low-frequency part and a high-frequency part. The high-frequency part is subdivided into a number of sub-bands and for each sub-band a control signal with reduced bandwidth is transmitted. A control signal is representative for the ratio between the energy in the sub-band of the speech signal and the energy in the corresponding sub-band of a reference signal with high-frequency components, which is produced from the low-frequency part of the speech signal.
    Type: Grant
    Filed: January 5, 1977
    Date of Patent: April 25, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Nico Valentinus Franssen, Karel Elbert Kuijk, Johannes Willem Siebelink
  • Patent number: 4084471
    Abstract: A circuit arrangement for generating the tones of a tonal scale includes a master oscillator and a number of sets of frequency converters. The output signals of each set of frequency converters forms each of the tones of an octave. A frequency shifter is connected between at least one selected set of frequency converters and the master oscillator in order to shift the frequency supplied to the selected set of frequency converters from the master oscillator to cause a desired shift in the frequency of each of the tones of the octave produced by the selected set of frequency converters.
    Type: Grant
    Filed: March 31, 1976
    Date of Patent: April 18, 1978
    Assignee: U.S. Philips Corporation
    Inventor: Nico Valentinus Franssen
  • Patent number: 4064505
    Abstract: A coder and a decoder having delay elements of the same delay time arranged one after the other in which the signal transmission ratio code of the signal paths from the input of the circuit to the output is chosen in accordance with bessel coefficients so as to prevent disturbing echoes.
    Type: Grant
    Filed: June 17, 1975
    Date of Patent: December 20, 1977
    Assignee: U.S. Philips Corporation
    Inventor: Nico Valentinus Franssen
  • Patent number: 4028566
    Abstract: A device for converting electric into acoustic vibrations and vice versa, provided with a diaphragm, comprising at least one layer of a piezoelectric polymer material, which is polarized in a transverse direction and which at either side is provided with electrodes, the diaphragm being undulated in at least one orthogonal section, whilst each flank of the undulation is polarized in the same direction over its entire width and in the operating condition the direction of the applied electric field relative to the direction of polarization in adjoining flanks are alternately parallel and anti-parallel. Two types of embodiments are possible.
    Type: Grant
    Filed: February 23, 1976
    Date of Patent: June 7, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Nico Valentinus Franssen, Frans Josef Maria Frankort