Patents Assigned to Tech Trade Corp.
  • Patent number: 4851915
    Abstract: This method is a direct development method for achieving a solid state image pickup device with a high speed electronic shutter on itself. A field integrating time is divided into a useless integrating time and a useful integrating time. The shorter one is the useful integrating time, the faster one is the electronic shutter speed. The useless integrated charges are cleared by the "photographic plate" clearing method. This image pickup camera apparatus is a high speed image pickup camera apparatus having low or slight high frame frequency, short explosure. A clear, relatively still or very slowly spinning images can be obtained by adjusting the field frequency of the high speed pickup camera apparatus.
    Type: Grant
    Filed: August 7, 1987
    Date of Patent: July 25, 1989
    Assignees: Xian Northwest Telecommunication Engineering Inst., Xian Intnl. Economic Tech. Trade Corp.
    Inventors: Jinyu Yang, Renxia Lu
  • Patent number: 4590062
    Abstract: The selection of: a hydrophobic carbohydrate polymer, e.g. ethyl cellulose; and, generally at least one digestive-difficulty soluble component, i.e. a wax, e.g. carnauba wax, fatty acid material or neutral lipid provides upon dry direct compression a controlled and continuous release matrix for tablets or implants of biologically active agents. Preferred for producing dry direct compressed products is the combination of: a hydrophobic cellulose derivative; a wax, and, a fatty acid material and/or a neutral lipid since it provides upon dry direct compression a controlled and continuous release tablet or implant of improved structurally integrity against externally imposed forces.
    Type: Grant
    Filed: July 6, 1984
    Date of Patent: May 20, 1986
    Assignee: Tech Trade Corp.
    Inventor: Choong-Gook Jang