Patents by Inventor Pierluigi Doria

Pierluigi Doria 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: 6289620
    Abstract: A smooth bore rifle barrel (10) comprising an initial portion or cartridge chamber (11), an intermediate portion or bore (12), a final portion, composed of a muzzle section (15, 16) and a terminal portion (13, 14) with a fixed choke or built in a manner to provide a series of interchangeable chokes. The muzzle section (15, 16) is provided with a conical fitting (15) connected to a portion (16) of the barrel (10) of a cylindrical shape, so as to attain, at a predetermined ratio between the lengths and diameters of the conical fitting (15) and of the cylindrical portion (16), a reduction of the recoiling force with respect to that of known rifle barrels, without changing the exit velocity and spreading angle of the gunshot.
    Type: Grant
    Filed: May 6, 1999
    Date of Patent: September 18, 2001
    Assignee: S.p.A. Fabbrica Bresciana Armi
    Inventor: Pierluigi Doria
  • Patent number: 4805333
    Abstract: A pack-type clip for shotgun cartridges comprises a container of box-like construction and elongate shape with an open end and two oppositely located, respectively muzzle and breech, minor walls, as well as major side walls. On each of the major side walls, proximately of the breech side minor wall, there is formed a lengthwise guide rib, the lengthwise ribs being oppositely located to face each other and set mutually apart by a distance substantially equal to the diameter of a cartridge.
    Type: Grant
    Filed: May 19, 1987
    Date of Patent: February 21, 1989
    Assignee: Luigi Franchi S.p.A.
    Inventors: Pierluigi Doria, Sergio Mottana