Patents by Inventor Jeannie E. Williams

Jeannie E. Williams 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).

  • Narrow divergence, single quantum well, separate confinement, algaas laser
    Patent number: 4989213
    Abstract: A narrow divergence, single quantum well, separate confinement, AlGaAs laser of the type which includes the following sequentially grown epitaxial layers: (a) an n-AlGaAs cladding layer; (b) an AlGaAs waveguide layer; (c) a GaAs quantum well layer; (d) an AlGaAs waveguide layer; (e) a p-AlGaAs cladding layer; and is improved to provide a far-field angular divergence in the order of thirty degrees (30.degree.), full width at half maximum (FWHM) with a reduced threshold current temperature sensitivity for use in electronic imaging printers.
    Type: Grant
    Filed: October 30, 1989
    Date of Patent: January 29, 1991
    Assignee: Polaroid Corporation
    Inventors: Thomas E. Haw, Jeannie E. Williams, Munib A. Wober