Patents by Inventor Daniel P. Wavroch

Daniel P. Wavroch 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).

  • Incoming call alert system for cellular telephones without wired connection thereto
    Patent number: 5404391
    Abstract: Each of the cellular telephones is adapted to receive a paging signal and to transmit a voice channel signal on a voice channel frequency in response to the paging signal. The alert system includes a receiver tuned to receive the voice channel frequency. A trigger circuit is connected to the output of the receiver to be activated by the receiver when the receiver receives a voice channel signal on the voice channel frequency. An alert is produced by either an audio signal generator, a vibratory generator or a radio mute, and each of the latter is connected to the ouput of the trigger. Thus, an alert is provided on receipt of an incoming telephone call.
    Type: Grant
    Filed: March 22, 1993
    Date of Patent: April 4, 1995
    Assignee: Developpement des Technologies M.W.M. Inc.
    Inventors: Daniel P. Wavroch, Leonard Machado