Patents by Inventor Hernan H. Rojas

Hernan H. Rojas 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).

  • High fidelity loudspeaker
    Patent number: 4232204
    Abstract: The loudspeaker includes a front panel of expanded polystyrene resiliently connected to side walls of the speaker enclosure. A standard loudspeaker is connected to the front panel, and there is a small diffuser cone concentric with the standard cone. The front panel is driven by the standard cone to reproduce low and medium frequencies and the diffuser cone reproduces high frequencies. Both speakers are driven by a common driver fixed to a rear panel or cross-beam of the enclosure.
    Type: Grant
    Filed: June 22, 1978
    Date of Patent: November 4, 1980
    Assignee: Comercial e Industrial Sound-Tronic Ltd.
    Inventor: Hernan H. Rojas