Patents by Inventor Minekazu Iwamoto

Minekazu Iwamoto 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).

  • Ceiling insert
    Patent number: 5468105
    Abstract: A tapered split nut with depressed by coil spring downward in a central hole of a outer cylinder body is installed so as it can move upward. A hanging bolt is inserted from the bottom while it is pushing said split nut up. Owing to the upward movement of the hanging bolt, the split nut moves downward due to a pushing movement with pressure by the coil spring, and the split nut engages with and bit the thread portion of the hanging bolt.
    Type: Grant
    Filed: June 6, 1994
    Date of Patent: November 21, 1995
    Inventor: Minekazu Iwamoto