Patents by Inventor Pietro Schiavo

Pietro Schiavo 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).

  • Cotton swab with depth prevention mechanism
    Patent number: 5147288
    Abstract: A cotton swab, comprising: an ear canal engaging portion of a small enough diameter to fit within and clean the inside surface of an ear canal, an adjacently located ear cavity engaging portion of greater diameter than the ear canal within which the cotton swab is intended to be used, and a stick securely holding the ear canal and ear cavity engaging portions, the stick having a longitudinal axis, the ear cavity engaging portion having a gradual sloping interface surface which is non-perpendicular to the axis of the stick and having a variable diameter and providing a smooth contour directly connected to the ear canal engaging portion, the ear cavity engaging portion comprising a first section incrementally increasing in dimension and located adjacent to the interface surface and a second section incrementally decreasing in dimension and located distally from the ear canal engaging portion, the first and seconds being substantially symmetrical to one another about an axis perpendicular to the longitudinal axi
    Type: Grant
    Filed: June 3, 1991
    Date of Patent: September 15, 1992
    Assignee: Ivalda S.p.A.
    Inventor: Pietro Schiavo
  • Cotton swab
    Patent number: D318730
    Type: Grant
    Filed: April 19, 1988
    Date of Patent: July 30, 1991
    Assignee: ivalda spa
    Inventor: Pietro Schiavo