Patents by Inventor Hal Baron

Hal Baron 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).

  • Combination outdoor daytime/nighttime advertising billboard
    Patent number: 5570138
    Abstract: A combination outdoor daytime/nighttime outdoor advertising display billboard is provided having a surface for displaying a fixed image during the daytime and a projection screen apparatus which automatically unrolls to present a projection screen for displaying a projected image during the nighttime. A projector placed in front of the billboard functions to project one or more images onto the projection screen. The projection screen and the projector are controlled by a photoelectric sensors that automatically unrolls the projection screen and activates the projector during the nighttime and automatically rolls up the projection screen and deactivates the projection means during the daytime.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: October 29, 1996
    Inventor: Hal Baron