Patents by Inventor Michael Vorrasi

Michael Vorrasi 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).

  • Combined writing instrument and slide rule
    Patent number: 4039819
    Abstract: An elongated transluscent plastic cylindrical member has a mechanical pencil formed at one end and has a longitudinally directed ridge projecting radially from the member on which are located first slide rule scales. A longitudinally slotted transluscent plastic tubular member slideably receives the cylindrical member with the ridge within the slot. The tubular member carries second slide rule scales along the slot for cooperation with the first scales. The cylindrical member carries a lamp and batteries for illuminating the scales.
    Type: Grant
    Filed: October 29, 1975
    Date of Patent: August 2, 1977
    Inventor: Michael Vorrasi