Patents by Inventor Otto F. Chew, Jr.

Otto F. Chew, Jr. 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).

  • Ring whirling device
    Patent number: 4018444
    Abstract: A skill toy for persons of all ages having a handle loosely supporting two spaced rings retained on hubs about which they are skillfully caused to rotate in opposite directions for amusement and exercise.
    Type: Grant
    Filed: September 25, 1975
    Date of Patent: April 19, 1977
    Inventors: Otto F. Chew, Jr., Louis W. Hinshaw