Patents by Inventor David B. Cale

David B. Cale 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).

  • Ventilated hat
    Patent number: 4476589
    Abstract: This invention pertains to a helmet having a novel ventilating structure located in the dome-shaped portion of the helmet.
    Type: Grant
    Filed: November 16, 1981
    Date of Patent: October 16, 1984
    Assignee: Dadant & Sons Inc.
    Inventors: Ralph C. Burgin, David B. Cale
  • Separator for honey and wax
    Patent number: 4385990
    Abstract: The present invention relates to a device for treating combs from beehives so as to separate the honey from the beeswax.
    Type: Grant
    Filed: December 29, 1981
    Date of Patent: May 31, 1983
    Assignee: Dadant & Sons Inc.
    Inventor: David B. Cale
  • Ventilated hat
    Patent number: D271250
    Type: Grant
    Filed: November 16, 1981
    Date of Patent: November 8, 1983
    Assignee: Dadant & Sons, Inc.
    Inventors: Ralph C. Burgin, David B. Cale