Patents by Inventor Manabu Nakaoka

Manabu Nakaoka 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).

  • Circular fluorescent lamp manufacturing apparatus
    Patent number: 4323225
    Abstract: A circular fluorescent lamp manufacturing apparatus is constructed such that it can accomplish both the basing process and the seasoning process with the use of a single machinery according to the present invention. The lamp manufacturing apparatus is characterized in its head construction. The circular glass tube is based and seasoned by the two rotations of a turntable and by the four turns of 90 degrees of a paired circular glass tube supporters to be effected in that meanwhile so that the circular fluorescent lamps can be finished.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: April 6, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Shigeaki Saita, Manabu Nakaoka