Patents by Inventor Edgar E. Fischer

Edgar E. Fischer 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).

  • Method of maintaining an uninterrupted warning signal
    Patent number: 4690059
    Abstract: An emergency flare for road and railway use which changes so a different color during the final stage of illumination, thus warning that burnout is approaching, and thereby allowing time for replacement or other means to warn oncoming traffic.
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: September 1, 1987
    Inventor: Edgar E. Fischer