Patents by Inventor Roger M. Anderson

Roger M. Anderson 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: 5414604
    Abstract: A reflector for a fluorescent fixture having an elongate generally cylindrically concave inner surface defining a cavity shaped so that all portions of a fluorescent lamp along the reflectivity axis are within the cavity. The inner surface of the reflector includes a specularly reflective major central portion that reflects a major portion of light emitted from the lamp generally normal to an imaginary plane across an outlet side of the cavity to illuminate an area beneath the fixture, and opposite reflective signal portions adjacent opposite sides of the reflector that each direct a minor portion of the light emitted by the lamp across the open side of the cavity and past the opposite edge of the inner surface to indicate to persons spaced from the illuminated area that the fluorescent lamp is emitting light.
    Type: Grant
    Filed: November 9, 1993
    Date of Patent: May 9, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Roger M. Anderson
  • Patent number: 4933821
    Abstract: An illuminator adapted to be illuminated by a fluorescent lamp mounted in a light fixture when the fluorescent lamp is emitting light to indicate that the fluorescent light is turned on. The light fixture is of the type having a fixture casing for holding the fluorescent lamp and including a specular reflector for reflecting the light emitted from the lamp generally downwardly toward an area to be illuminated without the light passing through a light diffuser. The illuminator comprises a generally transparent or translucent illuminator body, and illuminator-mounting flanges adapted for mounting the illuminator body on the fixture casing or reflector without the body interferring with or intersecting light transmitted generally directly downwardly toward the area to be illuminated. The body includes material having such an index of refraction and surfaces so contoured that a portion of the light originating from the fluorescent lamp is refracted at a sharp angle (e.g.
    Type: Grant
    Filed: May 5, 1989
    Date of Patent: June 12, 1990
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Roger M. Anderson