Patents by Inventor Oscar H. Longo

Oscar H. Longo 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).

  • Electric lamp having a push-in filament insert for filament mounting
    Patent number: 5140217
    Abstract: An electric lamp having a filament with open coiled ends and filament inserts have an end insertable into the open filament ends without threading cooperation and lockingly engage the filament turns. The ends of the filament inserts provide a resilient ratchetted coupling with the successive turns of the coiled filament ends. The filament inserts replace integral coil legs for coil mounting in the lamp.
    Type: Grant
    Filed: September 7, 1990
    Date of Patent: August 18, 1992
    Assignee: North American Philips Corporation
    Inventors: Raghunatha S. Rao, Oscar H. Longo