Patents by Inventor Rudolph C. Caldwell

Rudolph C. Caldwell 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).

  • Cigar moisture meter
    Patent number: 6604409
    Abstract: The cigar moisture meter comprises a probe engaged to an ohmmeter circuit, the probe being injected into the tip of a cigar to provide a reading of moisture content within the cigar by a measurement of resistance across the leads of the probe.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: August 12, 2003
    Inventor: Rudolph C. Caldwell