Patents by Inventor Herman F. Keller

Herman F. Keller 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).

  • Patent number: 4074252
    Abstract: A hand safety flasher for use in directing traffic by construction workers, at school crossings, by police, and so forth, comprises a hand-held receptacle for containing a plurality of flashlight cells together with a double lens safety structure having a light bulb contained therein and a flasher structure between the series connected flashlight cells and the bulb for intermittently flashing said bulb when the device is switched to the "on" position. One side of the lens may be amber, the other side red, and an indicating directional arrow may also be provided.
    Type: Grant
    Filed: May 20, 1976
    Date of Patent: February 14, 1978
    Assignees: Leon Nikkel, Kermit Nikkel, Lelus B. Brown
    Inventor: Herman F. Keller