Patents by Inventor Asger K. Hahne

Asger K. Hahne 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).

  • Service indicating device
    Patent number: 4028831
    Abstract: A service indicating device which includes a casing and a drawer slidably received in the casing. The drawer has a transparent front panel. Indicator element blocks are mounted in the drawer tandemwise with a front face of one of the indicator element blocks adjacent the front panel of the drawer to be viewed through the front panel. Top faces of the indicator element blocks are exposed when the drawer is open. There is indicia on front faces of the indicator element blocks to indicate the time for a service operation. Indicia on top faces of the indicator element blocks indicate the order for the blocks.
    Type: Grant
    Filed: October 9, 1975
    Date of Patent: June 14, 1977
    Inventor: Asger K. Hahne