Collecting Electrodes Are Flat Plates Patents (Class 96/79)
  • Photographic products comprising embossed supports
    Patent number: 4040830
    Abstract: Integral negative-positive diffusion transfer reflection prints are provided with a non-planar, e.g., lenticular, surface through which the transfer image is viewed.
    Type: Grant
    Filed: August 27, 1975
    Date of Patent: August 9, 1977
    Assignee: Polaroid Corporation
    Inventor: Howard G. Rogers
  • Reducing the reflectance of surfaces to radiation
    Patent number: 4013465
    Abstract: A method of producing a surface having a reduced reflectance to electromagnetic radiation in a predetermined wavelength band which comprises arranging on the surface a regular array of protuberances having a height which is not less than one third of the length of the longest wavelength in the band and at a spacing which is less than the length of the shortest wavelength of the band divided by the refractive index of the material of which the protuberances consist.
    Type: Grant
    Filed: February 9, 1976
    Date of Patent: March 22, 1977
    Assignee: Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Peter Brian Clapham, Michael Christopher Hutley