Patents by Inventor Bojan Bandelj

Bojan Bandelj 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).

  • Low power siren
    Patent number: 4393374
    Abstract: A low power siren having a high power sound and good tonal pattern. The siren consists of a casing with a motor and shaft protruding into a second casing. The inlet into the second casing allows for the passage of air, passing a rotor. Air cutters around the rotor merge with ribs which connect with a hub which is connected to the shaft. Air drawn through the inlet by rotation of the rotor passes the air cutters producing a noise.
    Type: Grant
    Filed: March 23, 1981
    Date of Patent: July 12, 1983
    Assignee: ISKRA-SOZD elektrokovinske industrije n.sol.o.
    Inventor: Bojan Bandelj