Patents by Inventor George Sack

George Sack 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).

  • Air eraser
    Patent number: 4090334
    Abstract: An air eraser is provided generally in the nature of a slightly enlarged pen. Compressed air carries particulate abrasive material from the pen for abrasive removal or erasure of indicia or the like on a base. A trigger controlled air valve is provided upstream of the abrasive material whereby it is impossible for any abrasive material to clog the valve. The flow stream through the air eraser is a straight-through one so that there is no problem of abrasive errosion of corners within the eraser.
    Type: Grant
    Filed: December 1, 1975
    Date of Patent: May 23, 1978
    Assignee: Paasche Airbrush Co.
    Inventors: Benedict Kurowski, George Sack