Patents Assigned to Manufactures Hanover Trust Company
  • Method of making plastic filter units having a welded cellulose filter
    Patent number: 4849061
    Abstract: A plastic filterware having a filter membrane made at least in part of cellulose nitrate welded to the filterware and a method of making same.
    Type: Grant
    Filed: August 10, 1987
    Date of Patent: July 18, 1989
    Assignee: Manufactures Hanover Trust Company
    Inventor: Robert G. Relyea