Patents by Inventor Michael VanWinkle

Michael VanWinkle 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).

  • Motorized chalk line apparatus
    Patent number: 6931742
    Abstract: Chalk line devices are commonly used in the building and/or construction arts. The motorized chalk line apparatus is particularly useful for automatically reeling in a chalk line wound about a spool that is journaled by a pair of stub axles. A battery powered drive automatically winds the chalk line about the spool. In use, the chalk line is manually pulled away from the apparatus to create the marking, but when the user actuates the switch, the spool automatically rewinds the chalk line.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: August 23, 2005
    Inventor: Michael VanWinkle