Patents by Inventor Daniel S. Leitman

Daniel S. Leitman 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).

  • Patent number: 5784436
    Abstract: An automatic telephone recorder includes a computer equipped with a sound signal handling feature and a digital recording medium such as a disk drive. The sound signal handling feature includes an audio input, an audio output and programmable means for selectively effecting digital recording on the recording medium of an audio signal applied to the sound signal handling means input. A line transformer is connected between a telephone line pair and the sound signal handling means audio input. The sound signal handling means is programmed to periodically test the sound signal handling means audio input to determine if audio or a predetermined transient signal, indicating that the telephone line has gone from an on-hook condition to an off-hook condition, is present. If the audio or transient signal is present, the sound signal handling means is programmed to institute recording of any audio signal present at the sound signal handling means audio input for as long as such audio remains.
    Type: Grant
    Filed: June 19, 1996
    Date of Patent: July 21, 1998
    Inventors: Howard B. Rosen, Daniel S. Leitman