Recorders Patents (Class 178/36)
Privacy (e.g., mechanical packaging or covering of printed message) (Class 178/37)
With type wheel (Class 178/38)
Paper guiding or feeding (Class 178/42)
  • Device for aiding abdominal muscle control
    Patent number: 4846157
    Abstract: A band for placement about the human anatomy with switch components on the band and displaceable from one another, upon enlargement of the band, to establish an electrical circuit to a signalling device. An elastic member retracts the band in the absence of anatomical pressure to open the circuit and terminate operation of the signalling device. The signalling device is disclosed as being of the vibratory type.
    Type: Grant
    Filed: August 1, 1988
    Date of Patent: July 11, 1989
    Inventor: M. Hayden Sears