Patents by Inventor Rita Helfand

Rita Helfand 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: 4836219
    Abstract: Electronic filters are applied to analog signals representative of eye movement and head movement, obtained from detectors attached to a simple headgear, to provide satisfactory information for automatically reporting an individual's sleep state. The filters determine whether there has been substantial eye and head movement in a given period. Each filter then generates binary output signals representing movement (or the absence of it). Noise filters and a comparison filter are then applied to the binary output signals to predict sleep state; REM sleep; NREM sleep; or wakefulness.
    Type: Grant
    Filed: July 8, 1987
    Date of Patent: June 6, 1989
    Assignee: President & Fellows of Harvard College
    Inventors: J. Allan Hobson, Adam Mamelak, Rita Helfand, Peretz Lavie