Patents by Inventor Asao Yamamoto

Asao Yamamoto 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).

  • Steel box-column for steel structures
    Patent number: 3989396
    Abstract: A steel box-column for steel structures comprises a pair of steel channel members each having beam-column connecting diaphragms set inside thereof at respective positions whereat flanges of beams are welded to the exterior of the channel members. The flanges and the web of each steel channel member are welded to three sides of each of the connection diaphragms. A pair of the steel channel members are welded to each other at ends of their flanges facing each other.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: November 2, 1976
    Assignee: Nippon Steel Corporation
    Inventors: Tsutomu Matsumoto, Asao Yamamoto