Patents by Inventor Paolo Selmin

Paolo Selmin 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).

  • Method and devices for the omnidirectional radiation of sound waves
    Patent number: 4322578
    Abstract: The present invention pertains to a method and apparatus for achieving a uniform omnidirectional radiation of sound waves, particularly at high frequencies, and for increasing selectivity and separation at frequencies in the medium to high frequency wave band The apparatus consists of a series of reflector-diffractor barriers which are frequency selective. Each barrier is operative to transmit sound waves of a frequency greater than a selected value and to reflect and omnidirectionally radiate sound waves of a frequency less than the value.
    Type: Grant
    Filed: September 6, 1978
    Date of Patent: March 30, 1982
    Assignee: Society AP Selmin SAS of Massimo Coltelli & Co.
    Inventor: Paolo Selmin