Patents by Inventor Leonardo Beltrame

Leonardo Beltrame 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).

  • Acoustic unit base for electropneumatic horns
    Patent number: 4541505
    Abstract: An improved acoustic unit base for electropneumatic horns, of the type comprising a main body peripherally seamed to an end piece with a diaphragm therebetween. Said main body is formed by connecting together a first and a second member of deep-drawn sheet metal, the first comprising a central hole and the second forming a cylindrical seat for receiving a bush with a lipped opening which rests on the diaphragm.
    Type: Grant
    Filed: July 28, 1983
    Date of Patent: September 17, 1985
    Assignee: Leonardo Beltrame
    Inventors: Leonardo Beltrame, Attilio Granziera