Patents by Inventor Daniel W. Zarwell

Daniel W. Zarwell 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).

  • Combined window and vent unit
    Patent number: 5315798
    Abstract: A combined window and vent unit which is vandal resistant yet is versatile in its ventilation and insulation capabilities. There is a freely movable window panel which is positioned in a rigid frame structure without the use of any hinge members yet can be retained therein in an intermediate ventilating position. The frame structure for the vent unit is easily assembled and the panel members and screening can be easily repaired.
    Type: Grant
    Filed: January 5, 1993
    Date of Patent: May 31, 1994
    Inventor: Daniel W. Zarwell
  • Modular building block
    Patent number: 4984403
    Abstract: A modular building block wherein a plurality of frame members sandwich fit panels therebetween so as to provide a block with a selective depth and insulation factors. The modular block can be interconnected with other similar blocks to provide any desired structure such as a window, wall or floor. The block is easily assembled yet can be repaired as the frame members can be disassembled and old panels replaced with new ones.
    Type: Grant
    Filed: October 25, 1989
    Date of Patent: January 15, 1991
    Inventor: Daniel W. Zarwell