Patents by Inventor Joseph P. Manna

Joseph P. Manna 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).

  • Stairtread with positioning and locking mechanism
    Patent number: 5088248
    Abstract: A circular staircase tread (10), capable of being formed in one piece, the tread having a flexible stacking (18), positioning and locking mechanism which allows on-site adjustment of the angular positioning of the treads in relation to each other and the on site modification of the resulting staircase.
    Type: Grant
    Filed: March 6, 1991
    Date of Patent: February 18, 1992
    Assignees: Edwin H. Paul, James V. Leicht, Joseph P. Manna
    Inventor: Joseph P. Manna