Patents by Inventor Bennet Blake

Bennet Blake 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).

  • Device for detecting tones on telephone lines
    Patent number: 5327493
    Abstract: Device for detecting and identifying call progress tones on telephone lines. The application discloses a device for converting auditory call progress tones to visual indications and a novel circuit for identifying and distinguishing call progress tones based on their on-off cadence, if any, along with various alternative embodiments including: (1) a device which converts call progress tones to visual indications as for use by the deaf, (2) a device which is programmed to automatically go off-hook at certain times, detect a tone such as a stuttered dial tone indicating a message waiting, and activate a visual indicator, and (3) the use of a capacitor or rechargeable battery which is periodically refreshed by the device automatically going off-hook and which, while the device is on-hook, provides power required by the device.
    Type: Grant
    Filed: May 2, 1991
    Date of Patent: July 5, 1994
    Assignee: Active Voice, Inc.
    Inventors: Robert L. Richmond, Martin Richmond, Richard Aydelotte, Bennet Blake