Patents by Inventor John I. Dunlop

John I. Dunlop 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).

  • Method and means for detecting decay in wood
    Patent number: 4399701
    Abstract: A method and apparatus for detecting degradation in wood by applying acoustic waves along the wood grain and measuring the bandwidths and frequencies or standing wave resonances induced in the wood as the frequency of the applied waves is varied. Good quality wood exhibits a substantially harmonic relationship between the frequencies at which resonances occur and the bandwidths of the resonances are relatively small.
    Type: Grant
    Filed: May 29, 1981
    Date of Patent: August 23, 1983
    Assignee: Unisearch Limited
    Inventor: John I. Dunlop